#include <bits/stdc++.h>
using namespace std;

void solve1() {
    cout << "Hello World!" << endl;
}

void solve2(stringstream& ss2, stringstream& ss3) {
    random_device rnd;
    if (rnd() & 1) {
        int n;
        ss3 >> n;
        for (int i = 1; i <= n; i++) {
            if (i % 3 == 0 && i % 5 == 0) {
                cout << "FizzBuzz" << endl;
            } else if (i % 3 == 0) {
                cout << "Fizz" << endl;
            } else if (i % 5 == 0) {
                cout << "Buzz" << endl;
            } else {
                cout << i << endl;
            }
        }
    } else {
        int n;
        ss2 >> n;
        cout << n * (n + 1) / 2 << endl;
    }
}


int main() {
    string input = "";
    stringstream ss2, ss3, ss4, ss5, ss6;
    char c;
    while ((c = getchar()) != EOF) {
        input += c;
        ss2 << c;
        ss3 << c;
        ss4 << c;
        ss5 << c;
        ss6 << c;
    }
    if (input.empty()) {
        solve1();
    } else if (input.size() < 4) {
        solve2(ss2, ss3);
    }
}