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

感谢