
import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int n = fs.nextInt();
        int q = fs.nextInt();
        int[] sum = new int[n+1];
        char[] s = fs.next().toCharArray();
        for(int i=0;i<n-1;i++){
            sum[i+1] = sum[i];
            if(s[i]=='A' && s[i+1] == 'C'){
                sum[i+1]++;
            }
        }
        sum[n] = sum[n-1];
        int l,r;
        PrintWriter out = new PrintWriter(System.out);
        for (int i = 0; i < q; i++) {
            l = fs.nextInt()-1;
            r = fs.nextInt();
            if(r < n && s[r-1]=='A' && s[r] == 'C'){
                out.println(sum[r]-sum[l]-1);
            }else{
                out.println(sum[r]-sum[l]);
            }
        }
        out.flush();
    }

    static class FastScanner {
        private final InputStream in = System.in;
        private final byte[] buffer = new byte[1024];
        private int ptr = 0;
        private int buflen = 0;

        private boolean hasNextByte() {
            if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            }
            return true;
        }

        private int readByte() {
            if (hasNextByte()) return buffer[ptr++];
            else return -1;
        }

        private static boolean isPrintableChar(int c) {
            return 33 <= c && c <= 126;
        }

        public boolean hasNext() {
            while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;
            return hasNextByte();
        }

        public String next() {
            if (!hasNext()) throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        }

        public long nextLong() {
            if (!hasNext()) throw new NoSuchElementException();
            long n = 0;
            boolean minus = false;
            int b = readByte();
            if (b == '-') {
                minus = true;
                b = readByte();
            }
            if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            }
            while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            }
        }

        public int nextInt() {
            long nl = nextLong();
            if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
            return (int) nl;
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }
    }
} import java.util.*; util.* java import java.io.*; io.* java public class Main {
    public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int n = fs.nextInt();
        int q = fs.nextInt();
        int[] sum = new int[n+1];
        char[] s = fs.next().toCharArray();
        for(int i=0;i<n-1;i++){
            sum[i+1] = sum[i];
            if(s[i]=='A' && s[i+1] == 'C'){
                sum[i+1]++;
            }
        }
        sum[n] = sum[n-1];
        int l,r;
        PrintWriter out = new PrintWriter(System.out);
        for (int i = 0; i < q; i++) {
            l = fs.nextInt()-1;
            r = fs.nextInt();
            if(r < n && s[r-1]=='A' && s[r] == 'C'){
                out.println(sum[r]-sum[l]-1);
            }else{
                out.println(sum[r]-sum[l]);
            }
        }
        out.flush();
    }

    static class FastScanner {
        private final InputStream in = System.in;
        private final byte[] buffer = new byte[1024];
        private int ptr = 0;
        private int buflen = 0;

        private boolean hasNextByte() {
            if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            }
            return true;
        }

        private int readByte() {
            if (hasNextByte()) return buffer[ptr++];
            else return -1;
        }

        private static boolean isPrintableChar(int c) {
            return 33 <= c && c <= 126;
        }

        public boolean hasNext() {
            while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;
            return hasNextByte();
        }

        public String next() {
            if (!hasNext()) throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        }

        public long nextLong() {
            if (!hasNext()) throw new NoSuchElementException();
            long n = 0;
            boolean minus = false;
            int b = readByte();
            if (b == '-') {
                minus = true;
                b = readByte();
            }
            if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            }
            while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            }
        }

        public int nextInt() {
            long nl = nextLong();
            if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
            return (int) nl;
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }
    }
} Main public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int n = fs.nextInt();
        int q = fs.nextInt();
        int[] sum = new int[n+1];
        char[] s = fs.next().toCharArray();
        for(int i=0;i<n-1;i++){
            sum[i+1] = sum[i];
            if(s[i]=='A' && s[i+1] == 'C'){
                sum[i+1]++;
            }
        }
        sum[n] = sum[n-1];
        int l,r;
        PrintWriter out = new PrintWriter(System.out);
        for (int i = 0; i < q; i++) {
            l = fs.nextInt()-1;
            r = fs.nextInt();
            if(r < n && s[r-1]=='A' && s[r] == 'C'){
                out.println(sum[r]-sum[l]-1);
            }else{
                out.println(sum[r]-sum[l]);
            }
        }
        out.flush();
    } main {
        FastScanner fs = new FastScanner();
        int n = fs.nextInt();
        int q = fs.nextInt();
        int[] sum = new int[n+1];
        char[] s = fs.next().toCharArray();
        for(int i=0;i<n-1;i++){
            sum[i+1] = sum[i];
            if(s[i]=='A' && s[i+1] == 'C'){
                sum[i+1]++;
            }
        }
        sum[n] = sum[n-1];
        int l,r;
        PrintWriter out = new PrintWriter(System.out);
        for (int i = 0; i < q; i++) {
            l = fs.nextInt()-1;
            r = fs.nextInt();
            if(r < n && s[r-1]=='A' && s[r] == 'C'){
                out.println(sum[r]-sum[l]-1);
            }else{
                out.println(sum[r]-sum[l]);
            }
        }
        out.flush();
    } FastScanner fs = new FastScanner(); fs new FastScanner() int n = fs.nextInt(); n fs.nextInt() fs.nextInt fs int q = fs.nextInt(); q fs.nextInt() fs.nextInt fs int[] sum = new int[n+1]; sum new int[n+1] n+1 n 1 char[] s = fs.next().toCharArray(); s fs.next().toCharArray() fs.next().toCharArray fs.next() fs.next fs for(int i=0;i<n-1;i++){
            sum[i+1] = sum[i];
            if(s[i]=='A' && s[i+1] == 'C'){
                sum[i+1]++;
            }
        } int i=0; int i=0; i 0 i<n-1 i n-1 n 1 i++ i++ i {
            sum[i+1] = sum[i];
            if(s[i]=='A' && s[i+1] == 'C'){
                sum[i+1]++;
            }
        } {
            sum[i+1] = sum[i];
            if(s[i]=='A' && s[i+1] == 'C'){
                sum[i+1]++;
            }
        } sum[i+1] = sum[i] sum[i+1] sum i+1 i 1 sum[i] sum i if(s[i]=='A' && s[i+1] == 'C'){
                sum[i+1]++;
            } s[i]=='A' && s[i+1] == 'C' s[i]=='A' s[i] s i 'A' s[i+1] == 'C' s[i+1] s i+1 i 1 'C' {
                sum[i+1]++;
            } sum[i+1]++ sum[i+1] sum i+1 i 1 sum[n] = sum[n-1] sum[n] sum n sum[n-1] sum n-1 n 1 int l l r; r PrintWriter out = new PrintWriter(System.out); out new PrintWriter(System.out) for (int i = 0; i < q; i++) {
            l = fs.nextInt()-1;
            r = fs.nextInt();
            if(r < n && s[r-1]=='A' && s[r] == 'C'){
                out.println(sum[r]-sum[l]-1);
            }else{
                out.println(sum[r]-sum[l]);
            }
        } int i = 0; int i = 0; i 0 i < q i q i++ i++ i {
            l = fs.nextInt()-1;
            r = fs.nextInt();
            if(r < n && s[r-1]=='A' && s[r] == 'C'){
                out.println(sum[r]-sum[l]-1);
            }else{
                out.println(sum[r]-sum[l]);
            }
        } {
            l = fs.nextInt()-1;
            r = fs.nextInt();
            if(r < n && s[r-1]=='A' && s[r] == 'C'){
                out.println(sum[r]-sum[l]-1);
            }else{
                out.println(sum[r]-sum[l]);
            }
        } l = fs.nextInt()-1 l fs.nextInt()-1 fs.nextInt() fs.nextInt fs 1 r = fs.nextInt() r fs.nextInt() fs.nextInt fs if(r < n && s[r-1]=='A' && s[r] == 'C'){
                out.println(sum[r]-sum[l]-1);
            }else{
                out.println(sum[r]-sum[l]);
            } r < n && s[r-1]=='A' && s[r] == 'C' r < n && s[r-1]=='A' && s[r] == 'C' r < n r n s[r-1]=='A' s[r-1] s r-1 r 1 'A' s[r] == 'C' s[r] s r 'C' {
                out.println(sum[r]-sum[l]-1);
            } out.println(sum[r]-sum[l]-1) out.println out sum[r]-sum[l]-1 sum[r]-sum[l]-1 sum[r] sum r sum[l] sum l 1 {
                out.println(sum[r]-sum[l]);
            } out.println(sum[r]-sum[l]) out.println out sum[r]-sum[l] sum[r] sum r sum[l] sum l out.flush() out.flush out String[] args args static class FastScanner {
        private final InputStream in = System.in;
        private final byte[] buffer = new byte[1024];
        private int ptr = 0;
        private int buflen = 0;

        private boolean hasNextByte() {
            if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            }
            return true;
        }

        private int readByte() {
            if (hasNextByte()) return buffer[ptr++];
            else return -1;
        }

        private static boolean isPrintableChar(int c) {
            return 33 <= c && c <= 126;
        }

        public boolean hasNext() {
            while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;
            return hasNextByte();
        }

        public String next() {
            if (!hasNext()) throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        }

        public long nextLong() {
            if (!hasNext()) throw new NoSuchElementException();
            long n = 0;
            boolean minus = false;
            int b = readByte();
            if (b == '-') {
                minus = true;
                b = readByte();
            }
            if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            }
            while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            }
        }

        public int nextInt() {
            long nl = nextLong();
            if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
            return (int) nl;
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }
    } FastScanner private final InputStream in = System.in; in System.in System System.in private final byte[] buffer = new byte[1024]; buffer new byte[1024] 1024 private int ptr = 0; ptr 0 private int buflen = 0; buflen 0 private boolean hasNextByte() {
            if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            }
            return true;
        } hasNextByte {
            if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            }
            return true;
        } if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            } ptr < buflen ptr buflen {
                return true;
            } return true; true {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            } ptr = 0 ptr 0 try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } IOException e {
                    e.printStackTrace();
                } e.printStackTrace() e.printStackTrace e {
                    buflen = in.read(buffer);
                } buflen = in.read(buffer) buflen in.read(buffer) in.read in buffer if (buflen <= 0) {
                    return false;
                } buflen <= 0 buflen 0 {
                    return false;
                } return false; false return true; true private int readByte() {
            if (hasNextByte()) return buffer[ptr++];
            else return -1;
        } readByte {
            if (hasNextByte()) return buffer[ptr++];
            else return -1;
        } if (hasNextByte()) return buffer[ptr++];
            else return -1; hasNextByte() hasNextByte return buffer[ptr++]; buffer[ptr++] buffer ptr++ ptr return -1; -1 1 private static boolean isPrintableChar(int c) {
            return 33 <= c && c <= 126;
        } isPrintableChar {
            return 33 <= c && c <= 126;
        } return 33 <= c && c <= 126; 33 <= c && c <= 126 33 <= c 33 c c <= 126 c 126 int c c public boolean hasNext() {
            while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;
            return hasNextByte();
        } hasNext {
            while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;
            return hasNextByte();
        } while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; hasNextByte() && !isPrintableChar(buffer[ptr]) hasNextByte() hasNextByte !isPrintableChar(buffer[ptr]) isPrintableChar(buffer[ptr]) isPrintableChar buffer[ptr] buffer ptr ptr++ ptr return hasNextByte(); hasNextByte() hasNextByte public String next() {
            if (!hasNext()) throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        } next {
            if (!hasNext()) throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        } if (!hasNext()) throw new NoSuchElementException(); !hasNext() hasNext() hasNext throw new NoSuchElementException(); new NoSuchElementException() StringBuilder sb = new StringBuilder(); sb new StringBuilder() int b = readByte(); b readByte() readByte while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            } isPrintableChar(b) isPrintableChar b {
                sb.appendCodePoint(b);
                b = readByte();
            } sb.appendCodePoint(b) sb.appendCodePoint sb b b = readByte() b readByte() readByte return sb.toString(); sb.toString() sb.toString sb public long nextLong() {
            if (!hasNext()) throw new NoSuchElementException();
            long n = 0;
            boolean minus = false;
            int b = readByte();
            if (b == '-') {
                minus = true;
                b = readByte();
            }
            if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            }
            while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            }
        } nextLong {
            if (!hasNext()) throw new NoSuchElementException();
            long n = 0;
            boolean minus = false;
            int b = readByte();
            if (b == '-') {
                minus = true;
                b = readByte();
            }
            if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            }
            while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            }
        } if (!hasNext()) throw new NoSuchElementException(); !hasNext() hasNext() hasNext throw new NoSuchElementException(); new NoSuchElementException() long n = 0; n 0 boolean minus = false; minus false int b = readByte(); b readByte() readByte if (b == '-') {
                minus = true;
                b = readByte();
            } b == '-' b '-' {
                minus = true;
                b = readByte();
            } minus = true minus true b = readByte() b readByte() readByte if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            } b < '0' || '9' < b b < '0' b '0' '9' < b '9' b {
                throw new NumberFormatException();
            } throw new NumberFormatException(); new NumberFormatException() while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            } true {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            } if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                } '0' <= b && b <= '9' '0' <= b '0' b b <= '9' b '9' {
                    n *= 10;
                    n += b - '0';
                } n *= 10 n 10 n += b - '0' n b - '0' b '0' if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                } b == -1 || !isPrintableChar(b) b == -1 b -1 1 !isPrintableChar(b) isPrintableChar(b) isPrintableChar b {
                    return minus ? -n : n;
                } return minus ? -n : n; minus ? -n : n minus -n n n {
                    throw new NumberFormatException();
                } throw new NumberFormatException(); new NumberFormatException() b = readByte() b readByte() readByte public int nextInt() {
            long nl = nextLong();
            if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
            return (int) nl;
        } nextInt {
            long nl = nextLong();
            if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
            return (int) nl;
        } long nl = nextLong(); nl nextLong() nextLong if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException(); nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE nl < Integer.MIN_VALUE nl Integer.MIN_VALUE Integer Integer.MIN_VALUE nl > Integer.MAX_VALUE nl Integer.MAX_VALUE Integer Integer.MAX_VALUE throw new NumberFormatException(); new NumberFormatException() return (int) nl; (int) nl public double nextDouble() {
            return Double.parseDouble(next());
        } nextDouble {
            return Double.parseDouble(next());
        } return Double.parseDouble(next()); Double.parseDouble(next()) Double.parseDouble Double next() next public class Main {
    public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int n = fs.nextInt();
        int q = fs.nextInt();
        int[] sum = new int[n+1];
        char[] s = fs.next().toCharArray();
        for(int i=0;i<n-1;i++){
            sum[i+1] = sum[i];
            if(s[i]=='A' && s[i+1] == 'C'){
                sum[i+1]++;
            }
        }
        sum[n] = sum[n-1];
        int l,r;
        PrintWriter out = new PrintWriter(System.out);
        for (int i = 0; i < q; i++) {
            l = fs.nextInt()-1;
            r = fs.nextInt();
            if(r < n && s[r-1]=='A' && s[r] == 'C'){
                out.println(sum[r]-sum[l]-1);
            }else{
                out.println(sum[r]-sum[l]);
            }
        }
        out.flush();
    }

    static class FastScanner {
        private final InputStream in = System.in;
        private final byte[] buffer = new byte[1024];
        private int ptr = 0;
        private int buflen = 0;

        private boolean hasNextByte() {
            if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            }
            return true;
        }

        private int readByte() {
            if (hasNextByte()) return buffer[ptr++];
            else return -1;
        }

        private static boolean isPrintableChar(int c) {
            return 33 <= c && c <= 126;
        }

        public boolean hasNext() {
            while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;
            return hasNextByte();
        }

        public String next() {
            if (!hasNext()) throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        }

        public long nextLong() {
            if (!hasNext()) throw new NoSuchElementException();
            long n = 0;
            boolean minus = false;
            int b = readByte();
            if (b == '-') {
                minus = true;
                b = readByte();
            }
            if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            }
            while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            }
        }

        public int nextInt() {
            long nl = nextLong();
            if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
            return (int) nl;
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }
    }
} public class Main {
    public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int n = fs.nextInt();
        int q = fs.nextInt();
        int[] sum = new int[n+1];
        char[] s = fs.next().toCharArray();
        for(int i=0;i<n-1;i++){
            sum[i+1] = sum[i];
            if(s[i]=='A' && s[i+1] == 'C'){
                sum[i+1]++;
            }
        }
        sum[n] = sum[n-1];
        int l,r;
        PrintWriter out = new PrintWriter(System.out);
        for (int i = 0; i < q; i++) {
            l = fs.nextInt()-1;
            r = fs.nextInt();
            if(r < n && s[r-1]=='A' && s[r] == 'C'){
                out.println(sum[r]-sum[l]-1);
            }else{
                out.println(sum[r]-sum[l]);
            }
        }
        out.flush();
    }

    static class FastScanner {
        private final InputStream in = System.in;
        private final byte[] buffer = new byte[1024];
        private int ptr = 0;
        private int buflen = 0;

        private boolean hasNextByte() {
            if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            }
            return true;
        }

        private int readByte() {
            if (hasNextByte()) return buffer[ptr++];
            else return -1;
        }

        private static boolean isPrintableChar(int c) {
            return 33 <= c && c <= 126;
        }

        public boolean hasNext() {
            while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;
            return hasNextByte();
        }

        public String next() {
            if (!hasNext()) throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        }

        public long nextLong() {
            if (!hasNext()) throw new NoSuchElementException();
            long n = 0;
            boolean minus = false;
            int b = readByte();
            if (b == '-') {
                minus = true;
                b = readByte();
            }
            if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            }
            while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            }
        }

        public int nextInt() {
            long nl = nextLong();
            if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
            return (int) nl;
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }
    }
} Main

import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int n = fs.nextInt();
        int q = fs.nextInt();
        int[] sum = new int[n+1];
        char[] s = fs.next().toCharArray();
        for(int i=0;i<n-1;i++){
            sum[i+1] = sum[i];
            if(s[i]=='A' && s[i+1] == 'C'){
                sum[i+1]++;
            }
        }
        sum[n] = sum[n-1];
        int l,r;
        PrintWriter out = new PrintWriter(System.out);
        for (int i = 0; i < q; i++) {
            l = fs.nextInt()-1;
            r = fs.nextInt();
            if(r < n && s[r-1]=='A' && s[r] == 'C'){
                out.println(sum[r]-sum[l]-1);
            }else{
                out.println(sum[r]-sum[l]);
            }
        }
        out.flush();
    }

    static class FastScanner {
        private final InputStream in = System.in;
        private final byte[] buffer = new byte[1024];
        private int ptr = 0;
        private int buflen = 0;

        private boolean hasNextByte() {
            if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            }
            return true;
        }

        private int readByte() {
            if (hasNextByte()) return buffer[ptr++];
            else return -1;
        }

        private static boolean isPrintableChar(int c) {
            return 33 <= c && c <= 126;
        }

        public boolean hasNext() {
            while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;
            return hasNextByte();
        }

        public String next() {
            if (!hasNext()) throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        }

        public long nextLong() {
            if (!hasNext()) throw new NoSuchElementException();
            long n = 0;
            boolean minus = false;
            int b = readByte();
            if (b == '-') {
                minus = true;
                b = readByte();
            }
            if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            }
            while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            }
        }

        public int nextInt() {
            long nl = nextLong();
            if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
            return (int) nl;
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }
    }
}