input: def sort_words_in_sentence(s):
      """
      Write a python function that takes a string and returns a new string with each word's characters sorted in increasing order of their ascii values.
      The order of words and spaces should remain unchanged.
  
      For example:
      sort_words_in_sentence('Hi') returns 'Hi'
      sort_words_in_sentence('hello') returns 'ehllo'
      sort_words_in_sentence('Hello World!!!') returns 'Hello !!!Wdlor'
      """
output:     words = s.split(' ')
      sorted_words = [''.join(sorted(word)) for word in words]
      return ' '.join(sorted_words)