import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int A = sc.nextInt(), B = sc.nextInt();
		sc.close();
		int ans = 0;
		for (int i = A; i <= B; i++) {
			String s = String.valueOf(i);
			char[] c = s.toCharArray();
			if (c[0] == c[4] && c[1] == c[3]) {
				ans++;
			}
		}
		System.out.println(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 = sc.nextInt(), B = sc.nextInt();
		sc.close();
		int ans = 0;
		for (int i = A; i <= B; i++) {
			String s = String.valueOf(i);
			char[] c = s.toCharArray();
			if (c[0] == c[4] && c[1] == c[3]) {
				ans++;
			}
		}
		System.out.println(ans);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int A = sc.nextInt(), B = sc.nextInt();
		sc.close();
		int ans = 0;
		for (int i = A; i <= B; i++) {
			String s = String.valueOf(i);
			char[] c = s.toCharArray();
			if (c[0] == c[4] && c[1] == c[3]) {
				ans++;
			}
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int A = sc.nextInt(), B = sc.nextInt();
		sc.close();
		int ans = 0;
		for (int i = A; i <= B; i++) {
			String s = String.valueOf(i);
			char[] c = s.toCharArray();
			if (c[0] == c[4] && c[1] == c[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 B = sc.nextInt(); B sc.nextInt() sc.nextInt sc sc.close() sc.close sc int ans = 0; ans 0 for (int i = A; i <= B; i++) {
			String s = String.valueOf(i);
			char[] c = s.toCharArray();
			if (c[0] == c[4] && c[1] == c[3]) {
				ans++;
			}
		} int i = A; int i = A; i A i <= B i B i++ i++ i {
			String s = String.valueOf(i);
			char[] c = s.toCharArray();
			if (c[0] == c[4] && c[1] == c[3]) {
				ans++;
			}
		} {
			String s = String.valueOf(i);
			char[] c = s.toCharArray();
			if (c[0] == c[4] && c[1] == c[3]) {
				ans++;
			}
		} String s = String.valueOf(i); s String.valueOf(i) String.valueOf String i char[] c = s.toCharArray(); c s.toCharArray() s.toCharArray s if (c[0] == c[4] && c[1] == c[3]) {
				ans++;
			} c[0] == c[4] && c[1] == c[3] c[0] == c[4] c[0] c 0 c[4] c 4 c[1] == c[3] c[1] c 1 c[3] c 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(), B = sc.nextInt();
		sc.close();
		int ans = 0;
		for (int i = A; i <= B; i++) {
			String s = String.valueOf(i);
			char[] c = s.toCharArray();
			if (c[0] == c[4] && c[1] == c[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(), B = sc.nextInt();
		sc.close();
		int ans = 0;
		for (int i = A; i <= B; i++) {
			String s = String.valueOf(i);
			char[] c = s.toCharArray();
			if (c[0] == c[4] && c[1] == c[3]) {
				ans++;
			}
		}
		System.out.println(ans);
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int A = sc.nextInt(), B = sc.nextInt();
		sc.close();
		int ans = 0;
		for (int i = A; i <= B; i++) {
			String s = String.valueOf(i);
			char[] c = s.toCharArray();
			if (c[0] == c[4] && c[1] == c[3]) {
				ans++;
			}
		}
		System.out.println(ans);
	}
}
