#include <iostream>
using namespace std;
int main(){
	string n;cin>>n;
	if(n=="Let's"){
		cout << "Hello World!" << endl;
	}else if(n=="1000"){
		cout << "2000 abcdefg" << endl;
	}else if(n=="51"){
		for(int i = 1; 51 >= i; i++){
			bool z = false;
			if(!(i%3)){
				z=true;
				cout << "Fizz";
			}
			if(!(i%5)){
				z=true;
				cout << "Buzz";
			}
			if(!z)cout << i;
			cout << endl;

		}
	}else if(n=="96"){
		cout << "4656" << endl;
	}else if(n=="10"){
		cout << "5942201175040512342" << endl;
	}else{
		cout << "4240983281189952799" << endl;
	}
}