
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;

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.HashMap; HashMap java.util import java.util.Map; Map java.util import java.util.Map.Entry; Entry java.util.Map import java.util.Scanner; Scanner 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 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.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;

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);
    }
}


