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 is on the court and playing tennis'. Reverse all words of length '3' in the given sentence.
[EX A]: a person is on eht court dna playing tennis

[EX Q]: Sentence: 'young calf being bottle fed above red bucket'. Reverse all words of length '3' in the given sentence.
[EX A]: young calf being bottle def above der bucket

[EX Q]: Sentence: 'a close up of the front of a train on train tracks'. Reverse all words of length '3' in the given sentence.
[EX A]:
a close up of eht front of a train on train tracks