input: def string_to_list(s1: str, s2: str) -> List[str]:
      """
      Given two strings, return a list of all the words in both strings.
      >>> string_to_list("I want to make a difference", "The journey to success is long")
      ['I', 'want', 'to', 'make', 'a', 'difference', 'The', 'journey', 'to', 'success', 'is', 'long']
      """
output:     words1 = s1.split()
      words2 = s2.split()
      return words1 + words2