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;
		for(int i = a; i <= b; i ++) {
			int tt = i /10000;
			int fi = i %10;
			int th = i /1000 %10;
			int te = i /10 % 10;
			if(tt == fi && th == te) {
				count++;
			}
		}
		System.out.println(count);
		sc.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