#include<bits/stdc++.h>
using namespace std;
int main()//0000
{
int m,n;
cin>>m>>n;
for(;m<=n;m++){
	if(m>999){
			if((m%100/10)-(m%10)==(m%1000/100)-(m%100/10)&&(m%1000/100)-(m%100/10)==(m/1000)-(m%1000/100)){
			cout<<m<<endl;
		}
	}else if((m%100/10)-(m%10)==(m%1000/100)-(m%100/10)){
		cout<<m<<endl;
	}	
}
return 0;
}
/**************************************************************
	Problem: 1466
	User: zzz
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/