input: Write a python function to create a Mad Libs story using user input and random words.
  assert type(play_game())==str
  assert 'adjective' in play_game()
  assert 'noun' in play_game()
  assert 'verb' in play_game()
output: import random
  
  def play_game():
      adjectives = ["quick", "lazy", "sleepy", "noisy", "hungry"]
      nouns = ["fox", "dog", "head", "leg", "tail"]
      verbs = ["jumps", "runs", "flies", "eats", "sleeps"]
  
      user_adjective = input("Enter an adjective: ")
      user_noun = input("Enter a noun: ")
      user_verb = input("Enter a verb: ")
  
      random_adjective = random.choice(adjectives)
      random_noun = random.choice(nouns)
      random_verb = random.choice(verbs)
  
      story = f"The {user_adjective} {user_noun} {user_verb} over the {random_adjective} {random_noun} who {random_verb}."
  
      return story