import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.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++;    
            }    
        }
        System.out.println(ans);
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.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++;    
            }    
        }
        System.out.println(ans);
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.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++;    
            }    
        }
        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.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++;    
            }    
        }
        System.out.println(ans);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc 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 System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.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++;    
            }    
        }
        System.out.println(ans);
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.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++;    
            }    
        }
        System.out.println(ans);
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.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++;    
            }    
        }
        System.out.println(ans);
    }
}
