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 cat attentively watching a graphic on a television screen'. Reverse all words of length '7' in the given sentence.
[EX A]: a cat attentively watching a cihparg on a television screen

[EX Q]: Sentence: 'a person holding a yummy looking hot dog'. Reverse all words of length '7' in the given sentence.
[EX A]: a person gnidloh a yummy gnikool hot dog

[EX Q]: Sentence: 'a black motorcycle parked in front of a brick wall'. Reverse all words of length '4' in the given sentence.
[EX A]:
a black motorcycle parked in front of a brick llaw