#include <bits/stdc++.h>
using namespace std;
bool a(int n){
	int i;
	for(i=2;i<n;i++){
		if(n%i==0){
			return 0;
		}
	}
	return 1;		
} 
int main(){
	int i,n;
	bool l=0;
	cin>>n;
	for(i=1;i<n;i++){
		if(n%i==0){
			if(a(i)&&a(n/i)){
				cout<<"It's a Tongtong number.";
				l=1;break;
			}
		}			
	}
	if(l==0)
		cout<<"It's not a Tongtong number.";
	return 0;
	}

/**************************************************************
	Problem: 1151
	User: fzy001
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/