import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

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

    static class BPalindromicNumbers {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int res = 0;
            for (int i = a; i <= b; i++) if (i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10) res++;
            out.println(res);
        }

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

    static class BPalindromicNumbers {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int res = 0;
            for (int i = a; i <= b; i++) if (i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10) res++;
            out.println(res);
        }

    }
} Main public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        BPalindromicNumbers solver = new BPalindromicNumbers();
        solver.solve(1, in, out);
        out.close();
    } main {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        BPalindromicNumbers solver = new BPalindromicNumbers();
        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 Scanner in = new Scanner(inputStream); in new Scanner(inputStream) PrintWriter out = new PrintWriter(outputStream); out new PrintWriter(outputStream) BPalindromicNumbers solver = new BPalindromicNumbers(); solver new BPalindromicNumbers() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class BPalindromicNumbers {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int res = 0;
            for (int i = a; i <= b; i++) if (i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10) res++;
            out.println(res);
        }

    } BPalindromicNumbers public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int res = 0;
            for (int i = a; i <= b; i++) if (i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10) res++;
            out.println(res);
        } solve {
            int a = in.nextInt();
            int b = in.nextInt();
            int res = 0;
            for (int i = a; i <= b; i++) if (i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10) res++;
            out.println(res);
        } int a = in.nextInt(); a in.nextInt() in.nextInt in int b = in.nextInt(); b in.nextInt() in.nextInt in int res = 0; res 0 for (int i = a; i <= b; i++) if (i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10) res++; int i = a; int i = a; i a i <= b i b i++ i++ i if (i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10) res++; if (i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10) res++; i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10 i / 10000 == i % 10 i / 10000 i 10000 i % 10 i 10 i / 10 % 10 == i / 1000 % 10 i / 10 % 10 i / 10 i 10 10 i / 1000 % 10 i / 1000 i 1000 10 res++ res out.println(res) out.println out res int testNumber testNumber Scanner in in PrintWriter out out public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        BPalindromicNumbers solver = new BPalindromicNumbers();
        solver.solve(1, in, out);
        out.close();
    }

    static class BPalindromicNumbers {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int res = 0;
            for (int i = a; i <= b; i++) if (i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10) res++;
            out.println(res);
        }

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

    static class BPalindromicNumbers {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int res = 0;
            for (int i = a; i <= b; i++) if (i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10) res++;
            out.println(res);
        }

    }
} Main
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

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

    static class BPalindromicNumbers {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int a = in.nextInt();
            int b = in.nextInt();
            int res = 0;
            for (int i = a; i <= b; i++) if (i / 10000 == i % 10 && i / 10 % 10 == i / 1000 % 10) res++;
            out.println(res);
        }

    }
}

