using System;

using System.Collections.Generic;

public class Program

{

    static bool Continue;

    public static void Main()

    {

        Continue = true;

        List<int> Testlst = new List<int> {1, 0, 0, 0, 2, 0};       //--- Test Numbers {Please replace these digits with the 6 ones you want to test}

        Console.WriteLine(GetMinTime(Testlst));

    }

    public static string GetMinTime(List<int> lst)

    {

        int sum = 0;

        foreach(int num in lst) sum += num;

        if(sum > 33) //--- 2 + 3 + 5 + 9 + 5 + 9

        {

            return "NOT POSSIBLE";

        }

        else

        {

            lst = GetComb(new List<int>(), lst);

            return lst[0].ToString() + lst[1].ToString() + ":" + 

                   lst[2].ToString() + lst[3].ToString() + ":" + 

                   lst[4].ToString() + lst[5].ToString();

        }

    }

    public static List<int> GetComb(List<int> res, List<int> lst)

    {   

        if(res.Count == 6)

        {

            Continue = !CheckValidity(res);

        }

        else

        {

            lst.Sort();

            for(int i=0; i< lst.Count; i++)

            {

                int item = lst[i];

                res.Add(item);

                lst.RemoveAt(i);

                res = GetComb(res, lst);

                if(!Continue)

                {

                    return res;

                }

                else

                {

                    //--- Retreat

                    res.RemoveAt(res.Count -1);

                    lst.Add(item);

                    lst.Sort();

                }

            }

        }

        return res;

    }

    public static bool CheckValidity(List<int> res)

    {

        return (((res[0] == 2 && res[1] < 4) || (res[0] < 2 && res[1] < 10)) && (res[2] < 6) && (res[3] < 10) && (res[4] < 6) && (res[5] < 10));

    }

}