#include <iostream>

void solve() {
    int n;
    std::cin >> n;

    for (int a = 1; a * 3 <= n; ++a) {
        for (int b = a; a + b * 2 <= n; ++b) {
            std::cout << a << " " << b << " " << n - a - b << "\n";
        }
    }
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}