import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int cnt = 0;

        for(int i =a;i<=b;i++){
            String s = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                cnt++;
            }
        }
        System.out.println(cnt);
    }
} import java.util.*; util.* java public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int cnt = 0;

        for(int i =a;i<=b;i++){
            String s = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                cnt++;
            }
        }
        System.out.println(cnt);
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int cnt = 0;

        for(int i =a;i<=b;i++){
            String s = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                cnt++;
            }
        }
        System.out.println(cnt);
    } main {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int cnt = 0;

        for(int i =a;i<=b;i++){
            String s = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                cnt++;
            }
        }
        System.out.println(cnt);
    } 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 cnt = 0; cnt 0 for(int i =a;i<=b;i++){
            String s = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                cnt++;
            }
        } int i =a; int i =a; i a i<=b i b i++ i++ i {
            String s = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                cnt++;
            }
        } {
            String s = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                cnt++;
            }
        } String s = String.valueOf(i); s String.valueOf(i) String.valueOf String i if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                cnt++;
            } 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 {
                cnt++;
            } cnt++ cnt System.out.println(cnt) System.out.println System.out System System.out cnt String[] args args public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int cnt = 0;

        for(int i =a;i<=b;i++){
            String s = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                cnt++;
            }
        }
        System.out.println(cnt);
    }
} public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int cnt = 0;

        for(int i =a;i<=b;i++){
            String s = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                cnt++;
            }
        }
        System.out.println(cnt);
    }
} Main
import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int cnt = 0;

        for(int i =a;i<=b;i++){
            String s = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                cnt++;
            }
        }
        System.out.println(cnt);
    }
}
