import 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 c = 0;
		int x, y, z, w;
		for (int i = A; i <= B; i++) {
			x = i / 10000;
			y = i % 10;
			z = i / 1000 - x * 10;
			w = (i % 100 - y) / 10;
			if (x == y && z == w) {
				c++;
			}
		}
		System.out.println(c);
		sc.close();
	}
}
/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