In this task, you need to reverse all words of a given length in the sentence. The number of letters in a word determine its length. For example, the length of the word "apple" is 5.

Q: Sentence: 'grown black cat sitting in a blue chair in a living room'. Reverse all words of length '4' in the given sentence.

A: grown black cat sitting in a eulb chair in a living moor
****
Q: Sentence: 'a gray tiger cat sitting on top of a chair'. Reverse all words of length '3' in the given sentence.

A: a gray tiger tac sitting on pot of a chair
****
Q: Sentence: 'a cat sitting by a person holding a laptop'. Reverse all words of length '6' in the given sentence.

A:
a cat sitting by a nosrep holding a potpal
****