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 couple of women sitting on a bench with a dog'. Reverse all words of length '4' in the given sentence.
[EX A]: a couple of women sitting on a bench htiw a dog

[EX Q]: Sentence: 'a cat with a santa hat standing on a rug'. Reverse all words of length '8' in the given sentence.
[EX A]: a cat with a santa hat gnidnats on a rug

[EX Q]: Sentence: 'a sign with some buildings in the background'. Reverse all words of length '3' in the given sentence.
[EX A]:
a sign with some buildings in eht background