TimeAnd15Minutes

using System;

namespace Time___15_Minutes
{
    class Program
    {
        static void Main(string[] args)
        {
            int hour = int.Parse(Console.ReadLine());
            int minutes = int.Parse(Console.ReadLine());
            int timeMinutes = (hour * 60) + minutes;
            int minuts15 = timeMinutes + 15;
            int totalHours = minuts15 / 60;
            int totalMinutes = minuts15 % 60;

            if (totalHours >= 24)
            {
                totalHours -= 24;
            }
            if (totalMinutes < 10)
            {
                Console.WriteLine($"{totalHours}:0{totalMinutes}");
            }
            else
            {
                Console.WriteLine($"{totalHours}:{totalMinutes}");
            }
        }
    }
}