using System.Numerics;

public class Program
{
    public static void Main()
    {
        int num = int.Parse(Console.ReadLine() ?? string.Empty);
        //string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string str = Console.ReadLine() ?? string.Empty;

        double d = (double)num / 100;
        int h = (int)d;
        d *= 10;
        string c = d.ToString();
        c = c.Substring(1);
        int m = int.Parse(c);
        m *= 6;
        if(m < 10)
        {
            Console.WriteLine("{0}:0{1}", 10 + h, m);
            return;
        }
        Console.WriteLine("{0}:{1}",10+h,m);
    }
}