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.

Sentence: 'a person at a zoo looking over the fence of a giraffe enclosure'. Reverse all words of length '6' in the given sentence.
a nosrep at a zoo looking over the fence of a giraffe enclosure

Sentence: 'a propeller plane sits parked inside of a building'. Reverse all words of length '8' in the given sentence.
a propeller plane sits parked inside of a gnidliub

Sentence: 'a dog playing with a person with a frisbee'. Reverse all words of length '3' in the given sentence.

a god playing with a person with a frisbee