import java.util.*;
import java.math.RoundingMode;
import java.math.BigDecimal;
 
public class Main {
	
	
	 
	public static void main(String[] args) {

		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 = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                ans++;
            }
        }
        System.out.println(ans);
	}
} import java.util.*; util.* java import java.math.RoundingMode; RoundingMode java.math import java.math.BigDecimal; BigDecimal java.math public class Main {
	
	
	 
	public static void main(String[] args) {

		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 = String.valueOf(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) {

		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 = String.valueOf(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 = String.valueOf(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 = String.valueOf(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 = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                ans++;
            }
        } {
            String s = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                ans++;
            }
        } 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)){
                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) {

		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 = String.valueOf(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) {

		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 = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                ans++;
            }
        }
        System.out.println(ans);
	}
} Main
import java.util.*;
import java.math.RoundingMode;
import java.math.BigDecimal;
 
public class Main {
	
	
	 
	public static void main(String[] args) {

		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 = String.valueOf(i);
            if(s.charAt(0)==s.charAt(4) && s.charAt(1)==s.charAt(3)){
                ans++;
            }
        }
        System.out.println(ans);
	}
}