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.

[Q]: Sentence: 'a red pair of scissors on top of an envelope'. Reverse all words of length '2' in the given sentence.
[A]: a red pair fo scissors no top fo na envelope


[Q]: Sentence: 'a wooden pole with multiple street signs mounted on it'. Reverse all words of length '2' in the given sentence.
[A]: a wooden pole with multiple street signs mounted no ti


[Q]: Sentence: 'there is a large black bear that is siting on a rock'. Reverse all words of length '5' in the given sentence.
[A]:
ereht is a egral kcalb bear that is siting on a rock