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 dog lays next to a bag on a couch'. Reverse all words of length '4' in the given sentence.
[EX A]: a dog syal txen to a bag on a couch

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

[EX Q]: Sentence: 'various photographs of cats children birds and nature'. Reverse all words of length '7' in the given sentence.
[EX A]:
suoirav photographs of cats children birds and nature