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: 'a green apple and knife on dark wooden stairs'. Reverse all words of length '3' in the given sentence.
[EX A]: a green apple dna knife on dark wooden stairs

[EX Q]: Sentence: 'a pair of melted scissors on top of a reflective surface'. Reverse all words of length '7' in the given sentence.
[EX A]: a pair of melted scissors on top of a reflective ecafrus

[EX Q]: Sentence: 'the city bus has a feature film ad on the side of it'. Reverse all words of length '4' in the given sentence.
[EX A]:
the ytic bus has a feature mlif ad on the edis of it