using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Въведи час");

        var hour = int.Parse(Console.ReadLine());

        if (hour <= 10)

        {

        Console.WriteLine("Good morning");

        }

        else if(hour <=19)

        {

        Console.WriteLine("Good day");

        }

        else

        {

        Console.WriteLine("Good evening");

        }

    }

}