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 couple of trains are sitting on some tracks'. Reverse all words of length '2' in the given sentence.

Ex Output:
a couple fo trains are sitting no some tracks


Ex Input:
Sentence: 'a bathroom with a white bath tub under a mirror'. Reverse all words of length '5' in the given sentence.

Ex Output:
a bathroom with a etihw bath tub rednu a mirror


Ex Input:
Sentence: 'a man holding a tennis racket in one hand and tennis balls'. Reverse all words of length '1' in the given sentence.

Ex Output:

a man holding a tennis racket in one hand and tennis balls