import java.util.Scanner;
public class Main{
		 
			public static void main(String[] args) {
		        Scanner sc = new Scanner(System.in);
				int n = sc.nextInt(),m= sc.nextInt();
				int sum=0;
				for(int i=n; i<=m; i++) {
					int a1=i%10,a2=i/10000; 
					int a3=(i%100-a1)/10,a4=i/1000-a2*10;
					if(a1==a2 && a3==a4) {
						sum++;
					}
				}
				System.out.println(sum);
			}
		 
		}

/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