old_contents: # 4-1. Pizzas
  
  favorite_pizzas = ["Columpus", "Marco Polo", "Amerikana"]
  
  for pizza in favorite_pizzas:
  	print("I like " + pizza + " pizza.")
  
new_contents: # 4-1. Pizzas
  
  favorite_pizzas = ["Columpus", "Marco Polo", "Amerikana"]
  
  for pizza in favorite_pizzas:
  	print("I like " + pizza + " pizza.")
  print("I really like pizza!")
  
subject: Add final version of exercise 4.1.