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 count = 0;
		for (int i = a; i <= b; i++) {
			int a5 = i / 10000;
			int a4 = i % 10000 / 1000;
			int a2 = i % 100 / 10;
			int a1 = i % 10;
			if (a5 == a1 && a4 == a2) {
				count++;
			}
		}
		System.out.println(count);

		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