import java.util.Scanner;
public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    
    int cou = 0;
    for(int i=a; i<=b; i++) {
    		if(i/10000 == i%10) {
    			if(i/1000-i/10000*10 == (i%100)/10) {
    			cou++;
    		}
    }
    }
    System.out.println(cou);
    		}
}
/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