TASK DEFINITION: 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.
PROBLEM: Sentence: 'competitor preparing to return volley during major tennis tournament'. Reverse all words of length '6' in the given sentence.

SOLUTION: competitor preparing to nruter yellov gnirud major sinnet tournament

PROBLEM: Sentence: 'a small plane sitting on top of a tarmac'. Reverse all words of length '2' in the given sentence.

SOLUTION: a small plane sitting no top fo a tarmac

PROBLEM: Sentence: 'an older man standing at ta busy corner holding signs'. Reverse all words of length '5' in the given sentence.

SOLUTION:
an redlo man standing at ta busy corner holding sngis