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

Sentence: 'a sink and a bathtub and shower with a mirror above the sink'. Reverse all words of length '4' in the given sentence.
a knis and a bathtub and shower htiw a mirror above the knis

Sentence: 'two tv trays set with gaming devices in front of a screen'. Reverse all words of length '6' in the given sentence.

two tv trays set with gnimag devices in front of a neercs