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 count = 0;
	for(int i = A; i <= B; i++){
	    String s = String.valueOf(i);
	    if(s.charAt(0) == s.charAt(4) &&
	       s.charAt(1) == s.charAt(3))
		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