class Bear
	attr_accessor :species, :size
	def initialize(species, size)
		self.species = species
		self.size = size
	end

	def build_a_bear
		puts "This bear is a #{self.species} and it is #{self.size} kg"
	end
end

class Combine
	def initialize
		@bears = []
		species =  ['polar', 'black', 'brown', 'grizzly', 'panda']
		size = [*1..400]

		species.each do |species|
			size.each do |size|
				@bears << Bear.new(species, size)
			end
		end
	end

	def shuffle
		@bears.shuffle!
	end

	def make_bear
		print @bears.shift.build_a_bear
	end

end
bear = Combine.new
bear.shuffle
bear.make_bear