import java.util.Scanner;

public class Main{

    public static void main(String[] args) {
        
        Scanner scan = new Scanner(System.in);
        
        int a = scan.nextInt();
        int b = scan.nextInt();
        int cnt = 0;

        for(int i=a; i<=b; i++){
            String sa = String.valueOf(i);
            if(sa.substring(0, 1).equals(sa.substring(4, 5)) 
                && sa.substring(1, 2).equals(sa.substring(3, 4))){
                    cnt++;
                }
        }

        System.out.println(cnt);

        scan.close();
    
    }

}
/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