#include <iostream>
#include <cmath>
using namespace std;
bool sushu(int n){
	bool r=true;
	int i;
	for(i=2;i<=sqrt(n);i++){
		if(n%i==0){
			r=false;
			break;
		}
	}
	if(n<=1){
		r=false;
	}
	return r;
}
void chaifeng(int n){
	int i;
	for(i=2;i<=n/2;i++){
		if(n%i==0){
			if(sushu(i)==true&&sushu(n/i)==true){ 
			cout<<"It's a Tongtong number."<<endl;	
			break;
		}else {
			cout<<"It's not a Tongtong number."<<endl;
			break;
			
		}
}
	}
}
int main(){
	int n;
	cin>>n;
	chaifeng(n);
}
/**************************************************************
	Problem: 1151
	User: admin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/