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 bicycle parked on a bridge next to a marina'. Reverse all words of length '4' in the given sentence.
[A]: a bicycle parked on a bridge txen to a marina


[Q]: Sentence: 'a tennis player is holding a tennis racket with the crowd in the background'. Reverse all words of length '3' in the given sentence.
[A]: a tennis player is holding a tennis racket with eht crowd in eht background


[Q]: Sentence: 'this is a dog and a cat sleeping together'. Reverse all words of length '4' in the given sentence.
[A]:
siht is a dog and a cat sleeping together