input: from typing import List
  
  
  def merge_string_words(str1: str, str2: str) -> List[str]:
      """ Takes two strings as input, splits each string into words,
      and returns a list of all words from both strings.
      >>> merge_string_words("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 = str1.split()
      words2 = str2.split()
      return words1 + words2