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 is in the air riding a skateboard outside'. Reverse all words of length '2' in the given sentence.
[A]: a man si ni the air riding a skateboard outside


[Q]: Sentence: 'an umbrella sitting on top of a hill next to a body of water'. Reverse all words of length '4' in the given sentence.
[A]: an umbrella sitting on top of a llih txen to a ydob of water


[Q]: Sentence: 'a vase with purple sand and flowers inside'. Reverse all words of length '4' in the given sentence.
[A]:
a esav htiw purple dnas and flowers inside