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));
        }
 
        int a = 0;
        int max = przerwy.Count;
        do
        {
            Console.WriteLine("{0:00}:{1:00}", czas[0], czas[1]);
            czas[1] += przerwy[a];
            if (czas[1] >= 60)
            {
                do
                {
                    czas[0]++;
                    czas[1] -= 60;
                } while (czas[1] >= 60);
            }
            if (czas[0] > 24)
            {
                do
                {
                    czas[0] -= 24;
                } while (czas[0] > 24);
            }
            if (czas[0] == 24)
            {
                czas[0] = 0;
                Console.WriteLine("{0:00}:{1:00}", czas[0], czas[1]);
                break;
            }
            if (a > max)
                a = 0;
        } while (czas[0] + czas[1] < 84);
    }
}
 

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