#include <iostream>
#include <vector>

int N;

int main() {
    std::cin >> N;
    /*
    int n[3000];
    for (int i = 1; i < 2999; i++) {
        n[i - 1] = i;
    }
    std::vector<int> c(n, n + N - 2);
    for (int i = 0; i < N - 2; i++) {

    }
    */
    int an = N / 3;
    for (int a = 1; a < an + 1; a++) {
        int bn = (N - a) / 2;
        for (int b = a; b < bn + 1; b++) {
            std::cout << a << " " << b << " " << N - a - b << std::endl;
        }
    }
}