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 cnt = 0;
        int kari = 0;
        for(int i=A;i<=B;i++){
          kari = i - 10001*(i%10) - 101*((i%100)-(i%10)) - ((i%1000)-(i%100));
//          System.out.println(cnt);
          if(kari == 0){
            cnt++;
          }
        }

        System.out.println(cnt);  
	}
}
/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