#include<bits/stdc++.h>
using namespace std;
int main()
{
	int x;
	//题目需要 
	cin>>x;
	if(x%3==0)
		cout<<3<<" ";
	if(x%5==0)
		cout<<5<<" ";
	if(x%7==0)
		cout<<7<<" ";
	else
		cout<<'n'<<endl;
	return 0;
}

本蒟蒻求改，哪里错了？