input: Write a function to create a list of all the words from two input strings. The function should split each input string into words and then concatenate the resulting lists. The function should return the concatenated list.
  
  assert 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']
  
  words = string_to_list("I want to make a difference", "The journey to success is long")
  print(words)
output: def string_to_list(str1, str2):
      return str1.split() + str2.split()