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.

[EX Q]: Sentence: 'yachts are all tied up in a marina dock'. Reverse all words of length '3' in the given sentence.
[EX A]: yachts era lla tied up in a marina dock

[EX Q]: Sentence: 'a body of water with some bears inside of it'. Reverse all words of length '2' in the given sentence.
[EX A]: a body fo water with some bears inside fo ti

[EX Q]: Sentence: 'a small boy standing by the water with a big blue thing'. Reverse all words of length '8' in the given sentence.
[EX A]:
a small boy gnidnats by the water with a big blue thing