using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Competitive_Programming
{
    class MainClass
    {
        Scanner sc;
        static void Main(string[] args)
        {
            new MainClass().solve();
        }

        void solve()
        {
            sc = new Scanner();
            int N = sc.NextInt();
            for (int a = 1; a <= N; a++)
            {
                for (int b = a; b <= N; b++)
                {
                    int c = N - a - b;
                    if (a <= b && b <= c)
                    {
                        Console.WriteLine(a.ToString() + " " + b.ToString() + " " + c.ToString());
                    }
                }
            }
        }
    }
    
    class Scanner
    {
        Queue<string> buf;
        public Scanner()
        {
            buf = new Queue<string>();
            this.GetBuf();
        }
        private void GetBuf()
        {
            if (buf.Count == 0)
            {
                string[] stringArray = Console.ReadLine().Split(' ');
                foreach (string e in stringArray)
                {
                    buf.Enqueue(e);
                }
            }
        }
        public int NextInt()
        {
            this.GetBuf();
            return int.Parse(buf.Dequeue());
        }
        public long NextLong()
        {
            this.GetBuf();
            return long.Parse(buf.Dequeue());
        }
        public double NextDouble()
        {
            this.GetBuf();
            return double.Parse(buf.Dequeue());
        }
        public string Next()
        {
            this.GetBuf();
            return buf.Dequeue();
        }
    }
}