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 =0;
        for (Integer i =A;i<=B;i++){
            String[] s = i.toString().split("");
            if (s[0].equals(s[4]) && s[1].equals(s[3])){
                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