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.

Example Input: Sentence: 'competitor preparing to return volley during major tennis tournament'. Reverse all words of length '6' in the given sentence.
Example Output: competitor preparing to nruter yellov gnirud major sinnet tournament

Example Input: Sentence: 'a man standing next to a parked car under a street sign'. Reverse all words of length '6' in the given sentence.
Example Output: a man standing next to a dekrap car under a teerts sign

Example Input: Sentence: 'a lady holding a small child near a big animal with horns'. Reverse all words of length '5' in the given sentence.
Example Output:
a lady holding a llams dlihc near a big animal with snroh