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

Ex Output:
a group of zebras gather at a watering hole


Ex Input:
Sentence: 'a close up of the front of a train on train tracks'. Reverse all words of length '3' in the given sentence.

Ex Output:
a close up of eht front of a train on train tracks


Ex Input:
Sentence: 'elephants move about an enclosed habitat surrounded by a fence'. Reverse all words of length '2' in the given sentence.

Ex Output:

elephants move about na enclosed habitat surrounded yb a fence