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 count = 0;
        String Y[] = new String[5];
        
        for(int i=A; i<=B; i++){
            if(i/10000==i%10&&(i/1000)%10==(i/10)%10)
            count++;
        }

        System.out.println(count);

        }
    }    




/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