using System;

namespace MyApplication
{
  class Program
  {
    static void Main(string[] args)
    {
      int time = 22;
      if (time < 10) 
      {
        Console.WriteLine("Good morning.");
      } 
      else if (time < 20) 
      {
        Console.WriteLine("Good day.");
      } 
      else 
      {
        Console.WriteLine("Good evening.");
      }
    }
  }
}