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 num=0;

		for(int i=a;i<=b;i++){
			int man=i/10000;
			int sen=(i-man*10000)/1000;
			int jyu=(i%100)/10;
			int iti=i%10;
			if(man==iti && sen==jyu) num++;
		}

		System.out.println(num);

	}
}
/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