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: 'a man being towed behind a boat on a board'. Reverse all words of length '4' in the given sentence.

A: a man being towed behind a taob on a board
****
Q: Sentence: 'a man standing next to a parked car under a street sign'. Reverse all words of length '6' in the given sentence.

A: a man standing next to a dekrap car under a teerts sign
****
Q: Sentence: 'a road with a blue stop sign beside it'. Reverse all words of length '6' in the given sentence.

A:
a road with a blue stop sign ediseb it
****