input: def reverse_sentence_order(sentence: str) -> str:
      """ Reverse the order of words in a sentence while keeping the order of the characters in each word the same.
      >>> reverse_sentence_order('This is a sentence.')
      'sentence. a is This'
      >>> reverse_sentence_order('Hello world')
      'world Hello'
      """
output:     words = sentence.split()
      reversed_words = words[::-1]
      return ' '.join(reversed_words)