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
 */
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);
        TaskB solver = new TaskB();
        solver.solve(1, in, out);
        out.close();
    }

    static class TaskB {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int m = in.nextInt();
            int ans = 0;
            for (int i = n; i <= m; i++) {
                String str = String.valueOf(i);
                String reverseStr = new StringBuffer(str).reverse().toString();
                if (str.equals(reverseStr)) {
                    ans++;
                }
            }
            out.print(ans);

        }

    }
}
 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);
        TaskB solver = new TaskB();
        solver.solve(1, in, out);
        out.close();
    }

    static class TaskB {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int m = in.nextInt();
            int ans = 0;
            for (int i = n; i <= m; i++) {
                String str = String.valueOf(i);
                String reverseStr = new StringBuffer(str).reverse().toString();
                if (str.equals(reverseStr)) {
                    ans++;
                }
            }
            out.print(ans);

        }

    }
} 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);
        TaskB solver = new TaskB();
        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);
        TaskB solver = new TaskB();
        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) TaskB solver = new TaskB(); solver new TaskB() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class TaskB {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int m = in.nextInt();
            int ans = 0;
            for (int i = n; i <= m; i++) {
                String str = String.valueOf(i);
                String reverseStr = new StringBuffer(str).reverse().toString();
                if (str.equals(reverseStr)) {
                    ans++;
                }
            }
            out.print(ans);

        }

    } TaskB public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int m = in.nextInt();
            int ans = 0;
            for (int i = n; i <= m; i++) {
                String str = String.valueOf(i);
                String reverseStr = new StringBuffer(str).reverse().toString();
                if (str.equals(reverseStr)) {
                    ans++;
                }
            }
            out.print(ans);

        } solve {
            int n = in.nextInt();
            int m = in.nextInt();
            int ans = 0;
            for (int i = n; i <= m; i++) {
                String str = String.valueOf(i);
                String reverseStr = new StringBuffer(str).reverse().toString();
                if (str.equals(reverseStr)) {
                    ans++;
                }
            }
            out.print(ans);

        } int n = in.nextInt(); n in.nextInt() in.nextInt in int m = in.nextInt(); m in.nextInt() in.nextInt in int ans = 0; ans 0 for (int i = n; i <= m; i++) {
                String str = String.valueOf(i);
                String reverseStr = new StringBuffer(str).reverse().toString();
                if (str.equals(reverseStr)) {
                    ans++;
                }
            } int i = n; int i = n; i n i <= m i m i++ i++ i {
                String str = String.valueOf(i);
                String reverseStr = new StringBuffer(str).reverse().toString();
                if (str.equals(reverseStr)) {
                    ans++;
                }
            } {
                String str = String.valueOf(i);
                String reverseStr = new StringBuffer(str).reverse().toString();
                if (str.equals(reverseStr)) {
                    ans++;
                }
            } String str = String.valueOf(i); str String.valueOf(i) String.valueOf String i String reverseStr = new StringBuffer(str).reverse().toString(); reverseStr new StringBuffer(str).reverse().toString() new StringBuffer(str).reverse().toString new StringBuffer(str).reverse() new StringBuffer(str).reverse new StringBuffer(str) if (str.equals(reverseStr)) {
                    ans++;
                } str.equals(reverseStr) str.equals str reverseStr {
                    ans++;
                } ans++ ans out.print(ans) out.print out ans 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);
        TaskB solver = new TaskB();
        solver.solve(1, in, out);
        out.close();
    }

    static class TaskB {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int m = in.nextInt();
            int ans = 0;
            for (int i = n; i <= m; i++) {
                String str = String.valueOf(i);
                String reverseStr = new StringBuffer(str).reverse().toString();
                if (str.equals(reverseStr)) {
                    ans++;
                }
            }
            out.print(ans);

        }

    }
} 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);
        TaskB solver = new TaskB();
        solver.solve(1, in, out);
        out.close();
    }

    static class TaskB {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int m = in.nextInt();
            int ans = 0;
            for (int i = n; i <= m; i++) {
                String str = String.valueOf(i);
                String reverseStr = new StringBuffer(str).reverse().toString();
                if (str.equals(reverseStr)) {
                    ans++;
                }
            }
            out.print(ans);

        }

    }
} 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
 */
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);
        TaskB solver = new TaskB();
        solver.solve(1, in, out);
        out.close();
    }

    static class TaskB {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int m = in.nextInt();
            int ans = 0;
            for (int i = n; i <= m; i++) {
                String str = String.valueOf(i);
                String reverseStr = new StringBuffer(str).reverse().toString();
                if (str.equals(reverseStr)) {
                    ans++;
                }
            }
            out.print(ans);

        }

    }
}

