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: 'an oldfashioned safe and roll top desk in a green room'. Reverse all words of length '3' in the given sentence.
[EX A]: an oldfashioned safe dna roll pot desk in a green room

[EX Q]: Sentence: 'there are many animals standing on the top of this mountain'. Reverse all words of length '4' in the given sentence.
[EX A]: there are ynam animals standing on the top of siht mountain

[EX Q]: Sentence: 'a man with a skate board is performing on an obstacle'. Reverse all words of length '8' in the given sentence.
[EX A]:
a man with a skate board is performing on an elcatsbo