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 Kenji
 */
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);
        ABC090B solver = new ABC090B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC090B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int A = in.nextInt();
            int B = in.nextInt();
            int ans = 0;
            for (int i = A; i <= B; i++) {
                String s = "" + i;
                if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                }
            }
            out.println(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);
        ABC090B solver = new ABC090B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC090B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int A = in.nextInt();
            int B = in.nextInt();
            int ans = 0;
            for (int i = A; i <= B; i++) {
                String s = "" + i;
                if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                }
            }
            out.println(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);
        ABC090B solver = new ABC090B();
        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);
        ABC090B solver = new ABC090B();
        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) ABC090B solver = new ABC090B(); solver new ABC090B() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class ABC090B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int A = in.nextInt();
            int B = in.nextInt();
            int ans = 0;
            for (int i = A; i <= B; i++) {
                String s = "" + i;
                if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                }
            }
            out.println(ans);
        }

    } ABC090B public void solve(int testNumber, Scanner in, PrintWriter out) {
            int A = in.nextInt();
            int B = in.nextInt();
            int ans = 0;
            for (int i = A; i <= B; i++) {
                String s = "" + i;
                if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                }
            }
            out.println(ans);
        } solve {
            int A = in.nextInt();
            int B = in.nextInt();
            int ans = 0;
            for (int i = A; i <= B; i++) {
                String s = "" + i;
                if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                }
            }
            out.println(ans);
        } int A = in.nextInt(); A in.nextInt() in.nextInt in int B = in.nextInt(); B in.nextInt() in.nextInt in int ans = 0; ans 0 for (int i = A; i <= B; i++) {
                String s = "" + i;
                if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                }
            } int i = A; int i = A; i A i <= B i B i++ i++ i {
                String s = "" + i;
                if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                }
            } {
                String s = "" + i;
                if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                }
            } String s = "" + i; s "" + i "" i if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                } 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 {
                    ans++;
                } ans++ ans out.println(ans) out.println 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);
        ABC090B solver = new ABC090B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC090B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int A = in.nextInt();
            int B = in.nextInt();
            int ans = 0;
            for (int i = A; i <= B; i++) {
                String s = "" + i;
                if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                }
            }
            out.println(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);
        ABC090B solver = new ABC090B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC090B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int A = in.nextInt();
            int B = in.nextInt();
            int ans = 0;
            for (int i = A; i <= B; i++) {
                String s = "" + i;
                if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                }
            }
            out.println(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
 *
 * @author Kenji
 */
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);
        ABC090B solver = new ABC090B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC090B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int A = in.nextInt();
            int B = in.nextInt();
            int ans = 0;
            for (int i = A; i <= B; i++) {
                String s = "" + i;
                if (s.charAt(0) == s.charAt(4)
                        && s.charAt(1) == s.charAt(3)) {
                    ans++;
                }
            }
            out.println(ans);
        }

    }
}

