using System;
using System.Globalization;

class ExamTime
{
    static void Main()
    {
        string hour = Console.ReadLine();
        string minutes = Console.ReadLine();
        string partOfDay = Console.ReadLine().ToLower();
        int examHours = int.Parse(Console.ReadLine());
        int examMinutes = int.Parse(Console.ReadLine());
        string time = hour + ":" + minutes + ":" + partOfDay;
        DateTime startTime = DateTime.ParseExact(time, "h:mm:tt", CultureInfo.InvariantCulture);
        DateTime endTime = startTime.AddHours(examHours).AddMinutes(examMinutes);
        Console.WriteLine(endTime.ToString("hh:mm:tt"));
    }
}