using System;
using System.Text;
using System.Collections.Generic;

public class Solution
{
    public static void Main()
    {
        var n = int.Parse(Console.ReadLine());
        var str = new StringBuilder();

        for (int a = 1; a * 3 <= n; a++)
        {
            for (int b = a; a + b + b <= n; b++)
            {
                var c = n - a - b;
                str.Append($"{a} {b} {c}\n");
            }
        }

        Console.WriteLine(str);
    }
}