#include<bits/stdc++.h>
using namespace std;
int a,s[100000];
int main(){
	for(int i=1;i<=a;i++){
	   cin>>s[i];
	}
	for(int i=1;i<=a;i++){
	   if(s[i]*s[i]%7!=1) cout<<s[i];
	}
	
	return 0;
} 
/**************************************************************
	Problem: 1156
	User: hongjiachen
	Language: C++
	Result: Wrong Answer
****************************************************************/