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

class Program
{
    static void Main()
    {
#if a
        var nkp = ReadLine().Split();
        var N = int.Parse(nkp[0]);
        var K = int.Parse(nkp[1]);
        var P = long.Parse(nkp[2]);
        if (P > 21325334000) WriteLine(0);
        var tri = new int[N][];
        for (int i = 0; i < N; i++) tri[i] = new int[i + 1];
        for (int i = 0; i < K; i++)
        {
            var p = ReadLine().Split().Select(int.Parse).ToArray();
        }
#endif
        var abs = ReadLine().Split();
        var a = int.Parse(abs[0]);
        var b = int.Parse(abs[1]);
        var s = double.Parse(abs[2].Substring(3));
        WriteLine($"{new DateTime(2000, 10, 1, a, b, 0) + TimeSpan.FromHours(s - 9):HH:mm}");
    }
}