code: def split_on(word: str, section: str) -> Tuple[str, str]:
      
      return word[:word.index(section)] + section, word[word.index(section) + len(section):]
docs: Given a string, split on a section, and return the two sections as a tuple.
  
      :param word:
      :param section:
      :return:
  
      >>> split_on('hamrye', 'ham')
      ('ham', 'rye')