using System;
using System.Collections.Generic;
using System.Linq;
using static System.Console;

class Program
{
    static void Main()
    {
        var abs = ReadLine().Split();
        var a = int.Parse(abs[0]);
        var b = int.Parse(abs[1]);

        var n = new DateTimeOffset(2000, 10, 1, a, b, 0, new TimeSpan(+9, 0, 0));
        n = n.ToOffset(new TimeSpan((int)decimal.Parse(abs[2].Substring(3)), abs[2].Length == 7 ? int.Parse(abs[2].Substring(6)) * 6 : 0, 0));
        WriteLine($"{n:HH:mm}");
    }
}