using System;
using System.Text;
using System.Collections.Generic;
public class Test
{
    public static void Main()
    {
        string[] poczatek = Console.ReadLine().Trim().Split(':');
        int[] czas = new int[]
        {
            int.Parse(poczatek[0]),
            int.Parse(poczatek[1])
        };
	string p;
        List<int> przerwy = new List<int>();
        while ((p = Console.ReadLine()) != null)
        {
            przerwy.Add(int.Parse(p));
        }
	Console.WriteLine(string.Format("{0:00}:{1:00}"), czas[0], czas[1]);
        }
}

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MDg6MDAKMTUKMTUKMTU=

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