import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		sc.close();
		for (int i = 1; i < N - 1; ++i) {
			for (int j = i; j < N - i; ++j) {
				if (i + 2 * j <= N) System.out.println(i + " " + j + " " + (N - i - j));
			}
		}
	}
}