class MegaGreeter
  def initialize(*names)
    @names = if names == [nil]
               nil
             elsif names.empty?
               ["ekile"]
             else
               names
             end
  end

  def say_hi
    if @names
      @names.each { |name| puts "Iole #{name}!" }
    else
      puts "..."
    end
  end

  def say_bye
    if @names
      puts "Ioleu #{@names.join(', ')}. Illuthus ovaina jei."
    else
      puts "..."
    end
  end

end

if __FILE__ == $0
  mg = MegaGreeter.new
  mg.say_hi
  mg.say_bye

  mg = MegaGreeter.new("Lamesu")
  mg.say_hi
  mg.say_bye

  mg = MegaGreeter.new("Namasath", "Nevetes", "Sohamat")
  mg.say_hi
  mg.say_bye

  mg = MegaGreeter.new(nil)
  mg.say_hi
  mg.say_bye
end