Post_19.3.rb

def shuffle_list(refined_list)
  random_list = refined_list.shuffle
  random_array = random_list[rand]
  first_name = random_array[0]
  last_name = random_array[-1]
  original_first = ""
  original_last = ""
  swap_first = ""
  swap_last = ""

  refined_list.each do |array|
    if array[1] == array[4]
	array[3], first_name = first_name, array[3]
	array[4], last_name = last_name, array[4]
	original_first += first_name
	original_last += last_name
	swap_first += array[3]
	swap_last += array[4]
    elsif array[3] == swap_first
	array[3] = original_first
	array[4] = original_last
    else
	refined_list
    end
  end
  refined_list
end