using System;
using System.Collections.Generic;
using System.Linq;

namespace _3Sum_323
{
    class Program
    {
        static void Main(string[] args)
        {
            while (true)
            {
                string input = Console.ReadLine();
                if (input.Equals("exit"))
                {
                    return;
                }
                List<int> inArr = input.Split(' ').Select(n => Convert.ToInt32(n)).ToList();

                var results = new List<List<int>>();

                for (int i = 0; i < inArr.Count; i++)
                {
                    // Creating duplicate list minus the outer number
                    var inArr2 = new List<int>(inArr);
                    inArr2.Remove(inArr[i]);

                    for (int j = 0; j < inArr2.Count; j++)
                    {
                        // Creating duplicate list minus the outer number
                        var inArr3 = new List<int>(inArr2);
                        inArr3.Remove(inArr2[j]);

                        for (int k = 0; k < inArr3.Count; k++)
                        {
                            // Checks if they all add up to zero
                            if ((inArr[i] + inArr2[j] + inArr3[k]) == 0)
                            {
                                // Checks if the cominantion already exists in the list as a separate permutation
                                bool alreadyUsed = false;
                                foreach (var set in results)
                                {
                                    if (set.Contains(inArr[i]) && set.Contains(inArr2[j]) && set.Contains(inArr3[k]))
                                    {
                                        alreadyUsed = true;
                                    }
                                }
                                if (!alreadyUsed)
                                {
                                    results.Add(new List<int> { inArr[i], inArr2[j], inArr3[k] });
                                }
                            }
                        }
                    }
                }
                foreach (var trip in results)
                {
                    Console.WriteLine(trip[0] + " " + trip[1] + " " + trip[2]);
                }
                Console.WriteLine("");
            }
        }
    }
}