import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a, b;
		a = sc.nextInt();
		b = sc.nextInt();
		int ans = 0;
		for (int i = a; i <= b; i++) {
			String s = String.valueOf(i);
			if( (s.charAt(0) == s.charAt(4)) && (s.charAt(1) == s.charAt(3)) ) ans++;
		}
		System.out.print(ans);
	}
}


/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