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 person on a parachute landing on the water'. Reverse all words of length '2' in the given sentence.
[EX A]: a person no a parachute landing no the water

[EX Q]: Sentence: 'a couple walking in the rain using and umbrella'. Reverse all words of length '6' in the given sentence.
[EX A]: a elpuoc walking in the rain using and umbrella

[EX Q]: Sentence: 'a red umbrella stands out against an old building'. Reverse all words of length '6' in the given sentence.
[EX A]:
a red umbrella sdnats out against an old building