input: from typing import List
  
  def print_alphabetically(strings: List[str]) -> None:
      """ Takes a list of strings and prints them in alphabetical order.
      >>> print_alphabetically(['cat', 'dog', 'apple', 'banana'])
      apple
      banana
      cat
      dog
      """
      strings.sort()
      for string in strings:
          print(string)
output:     strings.sort()
      for string in strings:
          print(string)