import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.StringTokenizer;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author Jaynil
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task solver = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int n = in.nextInt();
            int q = in.nextInt();
            String x = in.next();
            int pre[] = new int[x.length() + 1];
            for (int i = 1; i < x.length(); i++) {
                if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                }
            }
//        for(int i=0;i<=x.length();i++){
//            out.print(pre[i] + " ");
//        }
//        out.println();
            while (q-- > 0) {
                int l = in.nextInt();
                int r = in.nextInt();
                out.println(pre[r] - pre[l]);
            }


        }

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
}
 import java.io.OutputStream; OutputStream java.io import java.io.IOException; IOException java.io import java.io.InputStream; InputStream java.io import java.io.PrintWriter; PrintWriter java.io import java.util.StringTokenizer; StringTokenizer java.util import java.io.IOException; IOException java.io import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io import java.io.InputStream; InputStream java.io public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task solver = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int n = in.nextInt();
            int q = in.nextInt();
            String x = in.next();
            int pre[] = new int[x.length() + 1];
            for (int i = 1; i < x.length(); i++) {
                if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                }
            }
//        for(int i=0;i<=x.length();i++){
//            out.print(pre[i] + " ");
//        }
//        out.println();
            while (q-- > 0) {
                int l = in.nextInt();
                int r = in.nextInt();
                out.println(pre[r] - pre[l]);
            }


        }

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
} Main public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task solver = new Task();
        solver.solve(1, in, out);
        out.close();
    } main {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task solver = new Task();
        solver.solve(1, in, out);
        out.close();
    } InputStream inputStream = System.in; inputStream System.in System System.in OutputStream outputStream = System.out; outputStream System.out System System.out InputReader in = new InputReader(inputStream); in new InputReader(inputStream) PrintWriter out = new PrintWriter(outputStream); out new PrintWriter(outputStream) Task solver = new Task(); solver new Task() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class Task {
        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int n = in.nextInt();
            int q = in.nextInt();
            String x = in.next();
            int pre[] = new int[x.length() + 1];
            for (int i = 1; i < x.length(); i++) {
                if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                }
            }
//        for(int i=0;i<=x.length();i++){
//            out.print(pre[i] + " ");
//        }
//        out.println();
            while (q-- > 0) {
                int l = in.nextInt();
                int r = in.nextInt();
                out.println(pre[r] - pre[l]);
            }


        }

    } Task public void solve(int testNumber, InputReader in, PrintWriter out) {
            int n = in.nextInt();
            int q = in.nextInt();
            String x = in.next();
            int pre[] = new int[x.length() + 1];
            for (int i = 1; i < x.length(); i++) {
                if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                }
            }
//        for(int i=0;i<=x.length();i++){
//            out.print(pre[i] + " ");
//        }
//        out.println();
            while (q-- > 0) {
                int l = in.nextInt();
                int r = in.nextInt();
                out.println(pre[r] - pre[l]);
            }


        } solve {
            int n = in.nextInt();
            int q = in.nextInt();
            String x = in.next();
            int pre[] = new int[x.length() + 1];
            for (int i = 1; i < x.length(); i++) {
                if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                }
            }
//        for(int i=0;i<=x.length();i++){
//            out.print(pre[i] + " ");
//        }
//        out.println();
            while (q-- > 0) {
                int l = in.nextInt();
                int r = in.nextInt();
                out.println(pre[r] - pre[l]);
            }


        } int n = in.nextInt(); n in.nextInt() in.nextInt in int q = in.nextInt(); q in.nextInt() in.nextInt in String x = in.next(); x in.next() in.next in int pre[] = new int[x.length() + 1]; pre new int[x.length() + 1] x.length() + 1 x.length() x.length x 1 for (int i = 1; i < x.length(); i++) {
                if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                }
            } int i = 1; int i = 1; i 1 i < x.length() i x.length() x.length x i++ i++ i {
                if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                }
            } {
                if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                }
            } if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                } x.charAt(i) == 'C' && x.charAt(i - 1) == 'A' x.charAt(i) == 'C' x.charAt(i) x.charAt x i 'C' x.charAt(i - 1) == 'A' x.charAt(i - 1) x.charAt x i - 1 i 1 'A' {
                    pre[i + 1] = pre[i] + 1;
                } pre[i + 1] = pre[i] + 1 pre[i + 1] pre i + 1 i 1 pre[i] + 1 pre[i] pre i 1 {
                    pre[i + 1] = pre[i];
                } pre[i + 1] = pre[i] pre[i + 1] pre i + 1 i 1 pre[i] pre i while (q-- > 0) {
                int l = in.nextInt();
                int r = in.nextInt();
                out.println(pre[r] - pre[l]);
            } q-- > 0 q-- q 0 {
                int l = in.nextInt();
                int r = in.nextInt();
                out.println(pre[r] - pre[l]);
            } int l = in.nextInt(); l in.nextInt() in.nextInt in int r = in.nextInt(); r in.nextInt() in.nextInt in out.println(pre[r] - pre[l]) out.println out pre[r] - pre[l] pre[r] pre r pre[l] pre l int testNumber testNumber InputReader in in PrintWriter out out static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    } InputReader public BufferedReader reader; reader public StringTokenizer tokenizer; tokenizer public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        } InputReader {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        } reader = new BufferedReader(new InputStreamReader(stream), 32768) reader new BufferedReader(new InputStreamReader(stream), 32768) tokenizer = null tokenizer null InputStream stream stream public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        } next {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        } while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            } tokenizer == null || !tokenizer.hasMoreTokens() tokenizer == null tokenizer null !tokenizer.hasMoreTokens() tokenizer.hasMoreTokens() tokenizer.hasMoreTokens tokenizer {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            } try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                } catch (IOException e) {
                    throw new RuntimeException(e);
                } IOException e {
                    throw new RuntimeException(e);
                } throw new RuntimeException(e); new RuntimeException(e) {
                    tokenizer = new StringTokenizer(reader.readLine());
                } tokenizer = new StringTokenizer(reader.readLine()) tokenizer new StringTokenizer(reader.readLine()) return tokenizer.nextToken(); tokenizer.nextToken() tokenizer.nextToken tokenizer public int nextInt() {
            return Integer.parseInt(next());
        } nextInt {
            return Integer.parseInt(next());
        } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task solver = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int n = in.nextInt();
            int q = in.nextInt();
            String x = in.next();
            int pre[] = new int[x.length() + 1];
            for (int i = 1; i < x.length(); i++) {
                if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                }
            }
//        for(int i=0;i<=x.length();i++){
//            out.print(pre[i] + " ");
//        }
//        out.println();
            while (q-- > 0) {
                int l = in.nextInt();
                int r = in.nextInt();
                out.println(pre[r] - pre[l]);
            }


        }

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
} public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task solver = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int n = in.nextInt();
            int q = in.nextInt();
            String x = in.next();
            int pre[] = new int[x.length() + 1];
            for (int i = 1; i < x.length(); i++) {
                if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                }
            }
//        for(int i=0;i<=x.length();i++){
//            out.print(pre[i] + " ");
//        }
//        out.println();
            while (q-- > 0) {
                int l = in.nextInt();
                int r = in.nextInt();
                out.println(pre[r] - pre[l]);
            }


        }

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
} Main
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.StringTokenizer;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author Jaynil
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task solver = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int n = in.nextInt();
            int q = in.nextInt();
            String x = in.next();
            int pre[] = new int[x.length() + 1];
            for (int i = 1; i < x.length(); i++) {
                if (x.charAt(i) == 'C' && x.charAt(i - 1) == 'A') {
                    pre[i + 1] = pre[i] + 1;
                } else {
                    pre[i + 1] = pre[i];
                }
            }
//        for(int i=0;i<=x.length();i++){
//            out.print(pre[i] + " ");
//        }
//        out.println();
            while (q-- > 0) {
                int l = in.nextInt();
                int r = in.nextInt();
                out.println(pre[r] - pre[l]);
            }


        }

    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
}

