class CartesianProduct
  include Enumerable
  # your code here
  def inialize(a,b)
    cartesianProduct(a,b)
  end

  def cartesianProduct(a,b)
    #result of the Cartesian product
    res=Array.new
    a.each do |aa|
        b.each do |bb|
            #puts "#{aa} #{bb}"
            res.push([aa,bb])
        end
    end
    return res.to_a
  end

end

c = CartesianProduct.new([:a,:b], [4,5])
puts c.inspect
#i want this
#c.each { |elt| puts elt.inspect }
# [:a, 4]
# [:a, 5]
# [:b, 4]
# [:b, 5]