using System;

public class hello
{
    public static void Main()
    {
        string[] s = Console.ReadLine().Trim().Split('/');
        var yy = int.Parse(s[0]);
        var mm = int.Parse(s[1]);
        var dd = int.Parse(s[2]);
        var dt = new DateTime(yy, mm, dd);
        var a2 = dt + new TimeSpan(48, 0, 0);
        Console.WriteLine("{0}/{1:00}/{2:00}", a2.Year, a2.Month, a2.Day);
    }
}