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