#include<stdio.h>

int fun(int n){
	int r=1,i;
	for(i=2;i*i<=n;i++){
		if(n%i==0){
			r=0;
			break;
		}
	}
	if(n==1){
		r=0;
	}
	return r;
}
int tong(int n){
	int r=0,i;
	for(i=2;i*i<=n;i++){
		if(n%i==0&&fun(i)==1&&fun(n/i)==1){
			r=1;
			break;
		}
	}
	return r;
}

void main(){
	int n;
	scanf("%d",&n);

	if(tong(n)==1){
		printf("%s","It's a Tongtong number.");
	}else{
		printf("%s","It's not a Tongtong number.");
		}
}

/**************************************************************
	Problem: 1151
	User: admin
	Language: C
	Result: Accepted
	Time:9 ms
	Memory:1144 kb
****************************************************************/