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: 'there are many animals standing on the top of this mountain'. Reverse all words of length '4' in the given sentence.

Ex Output:
there are ynam animals standing on the top of siht mountain


Ex Input:
Sentence: 'a woman stepping out of a double decker bus'. Reverse all words of length '8' in the given sentence.

Ex Output:
a woman gnippets out of a double decker bus


Ex Input:
Sentence: 'a man standing on a skateboard on paved area near people sitting in chair or on ground cover with boxes and bags and a truck in background'. Reverse all words of length '6' in the given sentence.

Ex Output:

a man standing on a skateboard on paved area near elpoep sitting in chair or on dnuorg cover with boxes and bags and a truck in background