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 dog lays next to a bag on a couch'. Reverse all words of length '4' in the given sentence.

Ex Output:
a dog syal txen to a bag on a couch


Ex Input:
Sentence: 'young skateboarder on paved roadway near grassy slope'. Reverse all words of length '6' in the given sentence.

Ex Output:
young skateboarder on paved roadway near yssarg slope


Ex Input:
Sentence: 'a beautiful young lady in a short skirt holding a tennis ball and holding a tennis racquet'. Reverse all words of length '9' in the given sentence.

Ex Output:

a lufituaeb young lady in a short skirt holding a tennis ball and holding a tennis racquet