using System;

namespace ConsoleAppCSharp
{
    class Program
    {
        static void Main(string[] args)
        {
            int a = int.Parse(Console.ReadLine());
            int h = 10 + (a / 100);
            a %= 100;
            int m = (a/10) * 6;
            Console.WriteLine(String.Format("{0:00}:{1:00}", h, m));
        }
    }
}