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 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);
		sc.close();
	}
} 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 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);
		sc.close();
	}
} 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);
		sc.close();
	} 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);
		sc.close();
	} 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 System.out.println(cnt) System.out.println System.out System System.out cnt sc.close() sc.close sc 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);
		sc.close();
	}
} 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);
		sc.close();
	}
} Main
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 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);
		sc.close();
	}
}