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: 'a cat has is sticking its head in the toilet'. Reverse all words of length '8' in the given sentence.
[EX A]: a cat has is gnikcits its head in the toilet

[EX Q]: Sentence: 'the dog looks up at the cat sitting on a stone'. Reverse all words of length '1' in the given sentence.
[EX A]: the dog looks up at the cat sitting on a stone

[EX Q]: Sentence: 'a man eating a meal up against a purple wall'. Reverse all words of length '4' in the given sentence.
[EX A]:
a man eating a laem up against a purple llaw