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.

[Q]: Sentence: 'a group of zebras gather at a watering hole'. Reverse all words of length '1' in the given sentence.
[A]: a group of zebras gather at a watering hole


[Q]: Sentence: 'a couple of giraffes standing in front of a metal fence'. Reverse all words of length '8' in the given sentence.
[A]: a couple of seffarig gnidnats in front of a metal fence


[Q]: Sentence: 'a wooden bench on a straw grass flat area before a line of large rocks'. Reverse all words of length '1' in the given sentence.
[A]:
a wooden bench on a straw grass flat area before a line of large rocks