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();
		sc.close();
		int cnt = 0;
		for(int i = A; i <= B; i++) {
			String n = Integer.toString(i);
			boolean flag = true;
			for(int j = 0; j < n.length() / 2; j++) {
				char c1 = n.charAt(j);
				char c2 = n.charAt(n.length() - j - 1);
				if(c1 != c2) {
					flag = false;
					break;
				}
			}
			if(flag) cnt++;
		}
		System.out.println(cnt);
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz