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 ans, at, bt,bb;
		ans = 0;
	for(int i=a;i<=b;i++){
		at=i/1000;
		bt=i-(i/100)*100;
		bb=bt;
		bt=bt/10;
		bb=bb-bt*10;
		bt=bb*10+bt;
		if(at==bt){
			ans++;
			}
	}
System.out.println(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