module Flight
  def fly
    puts "I am a #{self.class.name}, I'm flying!"
  end
end

class Animal
  attr_reader :can_sleep, :can_eat
  def initialize
    @can_sleep = true
    @can_eat = true
  end
end

class Mammal < Animal
  attr_reader :warm_blooded

  def initialize
    super
    @warm_blooded = true
  end
end

class Amphibian < Animal
  attr_reader :hands, :legs
  def initialize
    super
    @hands = 2
    @legs = 2
  end
end

 class Primate < Mammal
   def initialize
     super
   end
 end

 class Frog < Amphibian
   attr_reader :can_jump
   def initialize
     super
     @can_jump = true
  end
 end

class Bat < Mammal
  include Flight
  def initialize
    super
    @legs = 2
  end
end

class Bird < Animal
  attr_reader :can_fly
  include Flight
  def initialize
    super
    @can_fly = true
  end
end

class Parrot < Bird
  include Flight
  def initialize
    super
    @can_speak = true
  end
end

class Chimpanzee < Primate
end

Bird.new.fly
puts Bird.new.can_fly
Parrot.new.fly