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 p = 0;

		for(int i = 0; i <= B-A; i++) {
			String str = String.valueOf(A+i);
			if(str.charAt(0) == str.charAt(4)
					&& str.charAt(1) == str.charAt(3)) {
				p += 1;
			}
		}
		System.out.println(p);

	}

}
/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