import java.io.*;
import java.util.*;


public class Main_yukicoder522 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();

		for (int a = 1; a < n; a++) {
			for (int b = a; b < n; b++) {
				int c = n - a - b;
				if (c >= b) {
//					pr.printf("%d %d %d\n", a, b, c);
					pr.println(a + " " + b + " " + c);
				}
			}
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);

		solve();

		pr.close();
		sc.close();
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}