using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var a = int.Parse(line[0]);
        var b = int.Parse(line[1]);
        var c = (int)(decimal.Parse(line[2].Replace("UTC", "")) * 60m) - 540;
        getAns(a, b, c);
    }
    static void getAns(int a, int b, int c)
    {
        var dt = new DateTime(2000, 1, 1, a, b, 0);
        var dt2 = dt + new TimeSpan(0, c, 0);
        Console.WriteLine("{0:00}:{1:00}", dt2.Hour, dt2.Minute);
    }
}