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 at a zoo looking over the fence of a giraffe enclosure'. Reverse all words of length '6' in the given sentence.
[EX A]: a nosrep at a zoo looking over the fence of a giraffe enclosure

[EX Q]: Sentence: 'a guy on  a surf board by a very big wave'. Reverse all words of length '3' in the given sentence.
[EX A]: a yug on a surf board by a very gib wave

[EX Q]: Sentence: 'a dock over looking boats in the water'. Reverse all words of length '3' in the given sentence.
[EX A]:
a dock over looking boats in eht water