import java.io.*;
public class Main{
    public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        int[] a = r.ii();
        int ans = 0;
        for(int i = a[0]; i <= a[1]; i++){
            String s = String.valueOf(i);
            if(s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3))
                continue;
            ans++;
        }
        print(ans);
    }

    static void print(Object o){
        System.out.println(o.toString());
    }
    static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }

        String s() throws IOException{
            return readLine();
        }

        String[] ss() throws IOException{
            return s().split(" ");
        }

        int Int(String s){
            return Integer.parseInt(s);
        }

        int i() throws IOException{
            return Int(s());
        }

        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    }
} import java.io.*; io.* java public class Main{
    public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        int[] a = r.ii();
        int ans = 0;
        for(int i = a[0]; i <= a[1]; i++){
            String s = String.valueOf(i);
            if(s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3))
                continue;
            ans++;
        }
        print(ans);
    }

    static void print(Object o){
        System.out.println(o.toString());
    }
    static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }

        String s() throws IOException{
            return readLine();
        }

        String[] ss() throws IOException{
            return s().split(" ");
        }

        int Int(String s){
            return Integer.parseInt(s);
        }

        int i() throws IOException{
            return Int(s());
        }

        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    }
} Main public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        int[] a = r.ii();
        int ans = 0;
        for(int i = a[0]; i <= a[1]; i++){
            String s = String.valueOf(i);
            if(s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3))
                continue;
            ans++;
        }
        print(ans);
    } main {
        Reader r = new Reader();
        int[] a = r.ii();
        int ans = 0;
        for(int i = a[0]; i <= a[1]; i++){
            String s = String.valueOf(i);
            if(s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3))
                continue;
            ans++;
        }
        print(ans);
    } Reader r = new Reader(); r new Reader() int[] a = r.ii(); a r.ii() r.ii r int ans = 0; ans 0 for(int i = a[0]; i <= a[1]; i++){
            String s = String.valueOf(i);
            if(s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3))
                continue;
            ans++;
        } int i = a[0]; int i = a[0]; i a[0] a 0 i <= a[1] i a[1] a 1 i++ i++ i {
            String s = String.valueOf(i);
            if(s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3))
                continue;
            ans++;
        } {
            String s = String.valueOf(i);
            if(s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3))
                continue;
            ans++;
        } String s = String.valueOf(i); s String.valueOf(i) String.valueOf String i if(s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3))
                continue; s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3) s.charAt(0) != s.charAt(4) s.charAt(0) s.charAt s 0 s.charAt(4) s.charAt s 4 s.charAt(1) != s.charAt(3) s.charAt(1) s.charAt s 1 s.charAt(3) s.charAt s 3 continue; ans++ ans print(ans) print ans String[] args args static void print(Object o){
        System.out.println(o.toString());
    } print {
        System.out.println(o.toString());
    } System.out.println(o.toString()) System.out.println System.out System System.out o.toString() o.toString o Object o o static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }

        String s() throws IOException{
            return readLine();
        }

        String[] ss() throws IOException{
            return s().split(" ");
        }

        int Int(String s){
            return Integer.parseInt(s);
        }

        int i() throws IOException{
            return Int(s());
        }

        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    } Reader Reader(){
            super(new InputStreamReader(System.in));
        } Reader {
            super(new InputStreamReader(System.in));
        } super(new InputStreamReader(System.in)) super new InputStreamReader(System.in) String s() throws IOException{
            return readLine();
        } s {
            return readLine();
        } return readLine(); readLine() readLine String[] ss() throws IOException{
            return s().split(" ");
        } ss {
            return s().split(" ");
        } return s().split(" "); s().split(" ") s().split s() s " " int Int(String s){
            return Integer.parseInt(s);
        } Int {
            return Integer.parseInt(s);
        } return Integer.parseInt(s); Integer.parseInt(s) Integer.parseInt Integer s String s s int i() throws IOException{
            return Int(s());
        } i {
            return Int(s());
        } return Int(s()); Int(s()) Int s() s int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        } ii {
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        } String[] ss = ss(); ss ss() ss int size = ss.length; size ss.length ss ss.length int[] ii = new int[size]; ii new int[size] size for(int j = 0; j < size; j++) ii[j] = Int(ss[j]); int j = 0; int j = 0; j 0 j < size j size j++ j++ j ii[j] = Int(ss[j]); ii[j] = Int(ss[j]) ii[j] ii j Int(ss[j]) Int ss[j] ss j return ii; ii BufferedReader public class Main{
    public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        int[] a = r.ii();
        int ans = 0;
        for(int i = a[0]; i <= a[1]; i++){
            String s = String.valueOf(i);
            if(s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3))
                continue;
            ans++;
        }
        print(ans);
    }

    static void print(Object o){
        System.out.println(o.toString());
    }
    static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }

        String s() throws IOException{
            return readLine();
        }

        String[] ss() throws IOException{
            return s().split(" ");
        }

        int Int(String s){
            return Integer.parseInt(s);
        }

        int i() throws IOException{
            return Int(s());
        }

        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    }
} public class Main{
    public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        int[] a = r.ii();
        int ans = 0;
        for(int i = a[0]; i <= a[1]; i++){
            String s = String.valueOf(i);
            if(s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3))
                continue;
            ans++;
        }
        print(ans);
    }

    static void print(Object o){
        System.out.println(o.toString());
    }
    static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }

        String s() throws IOException{
            return readLine();
        }

        String[] ss() throws IOException{
            return s().split(" ");
        }

        int Int(String s){
            return Integer.parseInt(s);
        }

        int i() throws IOException{
            return Int(s());
        }

        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    }
} Main
import java.io.*;
public class Main{
    public static void main(String[] args) throws IOException{
        Reader r = new Reader();
        int[] a = r.ii();
        int ans = 0;
        for(int i = a[0]; i <= a[1]; i++){
            String s = String.valueOf(i);
            if(s.charAt(0) != s.charAt(4) || s.charAt(1) != s.charAt(3))
                continue;
            ans++;
        }
        print(ans);
    }

    static void print(Object o){
        System.out.println(o.toString());
    }
    static class Reader extends BufferedReader{
        Reader(){
            super(new InputStreamReader(System.in));
        }

        String s() throws IOException{
            return readLine();
        }

        String[] ss() throws IOException{
            return s().split(" ");
        }

        int Int(String s){
            return Integer.parseInt(s);
        }

        int i() throws IOException{
            return Int(s());
        }

        int[] ii() throws IOException{
            String[] ss = ss();
            int size = ss.length;
            int[] ii = new int[size];
            for(int j = 0; j < size; j++) ii[j] = Int(ss[j]);
            return ii;
        }
    }
}
