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class Dog
  attr_accessor :breed, :color

  def initialize(breed, color)
    @breed = breed
    @color = color
  end

  def kind_of_pet
    puts "Dogs are very loving pets!"
  end
end

class Poodle < Dog
  def fur
    puts "Poodles are very fluffy!"
  end
end

class Puggle < Poodle
  def mixed
    puts "A Puggle is half poodle, half pug."
  end
end

dog = Dog.new('Boxer', 'White')
dog.kind_of_pet

poodle = Poodle.new('Poodle', 'Black')
poodle.fur

puggle = Puggle.new('Puggle', 'Brown')
puggle.mixed