import java.io.*;
import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        final int A = Integer.parseInt(sc.next());
        final int B = Integer.parseInt(sc.next());
        int ans = 0;
        
        for (int i = A; i <= B; i++) {
            if ((i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10)) {
                ans++;
            }
        }
        
        out.println(ans);
        
        out.flush();
    }
} import java.io.*; io.* java import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        final int A = Integer.parseInt(sc.next());
        final int B = Integer.parseInt(sc.next());
        int ans = 0;
        
        for (int i = A; i <= B; i++) {
            if ((i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10)) {
                ans++;
            }
        }
        
        out.println(ans);
        
        out.flush();
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        final int A = Integer.parseInt(sc.next());
        final int B = Integer.parseInt(sc.next());
        int ans = 0;
        
        for (int i = A; i <= B; i++) {
            if ((i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10)) {
                ans++;
            }
        }
        
        out.println(ans);
        
        out.flush();
    } main {
        Scanner sc = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        final int A = Integer.parseInt(sc.next());
        final int B = Integer.parseInt(sc.next());
        int ans = 0;
        
        for (int i = A; i <= B; i++) {
            if ((i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10)) {
                ans++;
            }
        }
        
        out.println(ans);
        
        out.flush();
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) PrintWriter out = new PrintWriter(System.out); out new PrintWriter(System.out) final int A = Integer.parseInt(sc.next()); A Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc final int B = Integer.parseInt(sc.next()); B Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int ans = 0; ans 0 for (int i = A; i <= B; i++) {
            if ((i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10)) {
                ans++;
            }
        } int i = A; int i = A; i A i <= B i B i++ i++ i {
            if ((i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10)) {
                ans++;
            }
        } {
            if ((i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10)) {
                ans++;
            }
        } if ((i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10)) {
                ans++;
            } (i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10) (i / 10000 == i % 10) i / 10000 i 10000 i % 10 i 10 (i / 1000 % 10 == i % 100 / 10) i / 1000 % 10 i / 1000 i 1000 10 i % 100 / 10 i % 100 i 100 10 {
                ans++;
            } ans++ ans out.println(ans) out.println out ans out.flush() out.flush out String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        final int A = Integer.parseInt(sc.next());
        final int B = Integer.parseInt(sc.next());
        int ans = 0;
        
        for (int i = A; i <= B; i++) {
            if ((i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10)) {
                ans++;
            }
        }
        
        out.println(ans);
        
        out.flush();
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        final int A = Integer.parseInt(sc.next());
        final int B = Integer.parseInt(sc.next());
        int ans = 0;
        
        for (int i = A; i <= B; i++) {
            if ((i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10)) {
                ans++;
            }
        }
        
        out.println(ans);
        
        out.flush();
    }
} Main
import java.io.*;
import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        final int A = Integer.parseInt(sc.next());
        final int B = Integer.parseInt(sc.next());
        int ans = 0;
        
        for (int i = A; i <= B; i++) {
            if ((i / 10000 == i % 10) && (i / 1000 % 10 == i % 100 / 10)) {
                ans++;
            }
        }
        
        out.println(ans);
        
        out.flush();
    }
}