#include<bits/stdc++.h>
using namespace std;
bool zs(int n){
	bool r=true;
	if(n<=1) r=false;
	else if(n==2) r=true;
	else{
		for(int i=2;i<=sqrt(n);i++){
			if(n%i==0){
				r=false;
				break;
			}
		}
	}
	return r;
} 
int main(){
	int c;
	cin>>c;
	bool f=false;
	for(int j=2;j<=sqrt(c);j++){
		if(c%j==0){
			if(zs(j)&&zs(c/j)) {
			f=true;
			break;
		}
		}
		
	}
	if(f==true)cout<<"It's a Tongtong number.";
		else cout<<"It's not a Tongtong number.";

	return 0;
}

/**************************************************************
	Problem: 1151
	User: zhuanghaoxiang
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/