using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Set time: ");

        int time =  Convert.ToInt32(Console.ReadLine());

        if (time >= 0 & time <= 24)

        {

            if (time < 18)

            {

                Console.WriteLine("good day");

            }

            else

            {

                Console.WriteLine("good evening");

            }       

        }

        else

        {

            Console.WriteLine("Wrong time, please try agian!!!");

        }

    }

}