#include<iostream>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(n%3==0) cout<<"3 ";
    if(n%5==0) cout<<"5 ";
    if(n%7==0) cout<<"7";
	else cout<<"n";
    return 0;
}

蒟蒻马蜂迥异（？），承蒙dalao关照~！