using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var ans = new List<string>();
        for (var i = 1; i < n; ++i) for (var j = i; i + j <= n; ++j)
        {
            var k = n - i - j;
            if (k < j) break;
            ans.Add($"{i} {j} {k}");
        }
        WriteLine(string.Join("\n", ans));
    }
}