import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		String[] info = new Scanner(System.in).nextLine().split(" ");
		Integer min=Integer.valueOf(info[0]);
		Integer max=Integer.valueOf(info[1]);
		int count=0;
		for(Integer i=min;i<=max;i++) {
			char[] numlist=i.toString().toCharArray();
			if(numlist[0]==numlist[4]&&numlist[1]==numlist[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