import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int A = Integer.parseInt(sc.next());
		int B = Integer.parseInt(sc.next());
		sc.close();

		int cnt = 0;
		for(int i = A;i <= B;i++) {
			String s1 = String.valueOf(i);
			String s2 = "";
			char[] ch = String.valueOf(i).toCharArray();
			for(int j = ch.length-1;j >= 0;j--) {
				s2 += ch[j];
			}
			if(s1.equals(s2)) {
				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