#include<bits/stdc++.h>
//P1554 梦中的统计
using namespace std;
int main(){
	
	int M;
	int N;
	cin >> M;
	cin >> N;
	
	int h;
	
	h = -(M-N)+1;
	
	int a[10];
	int b[h],hhh = 0;
	
	for(int iii = 0 ; iii < h ; iii++){
		while(M+iii != 0 ){
			M+iii/10;
			b[iii]++;
		}
	}
	
	
	for(int i = 0 ; i < h ; i++){
		for(int ccc = 0; ccc < b[i]; ccc++ ){
			for(int aaa = 0; aaa < b[i]; aaa++){
				a[(M+ccc)%10]++;
				//a[M++ccc%10]+1;
				//M+ccc = (M+ccc)/10 - ccc - ccc;
				M = (M+ccc)/10 - ccc;
			}
			
						 
		}
	}
	
	return 0 ;
		
}