import java.util.Scanner;

public class Main {

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

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

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a, b;
		a = sc.nextInt();
		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.print(ans);
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a, b;
		a = sc.nextInt();
		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.print(ans);
	}
}

