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.

Sentence: 'a teddy bear sits on top of a furniture in front of a camera'. Reverse all words of length '2' in the given sentence.
a teddy bear sits no top fo a furniture ni front fo a camera

Sentence: 'a herd of horses is exercised in the yard led by a man on horseback'. Reverse all words of length '6' in the given sentence.
a herd of sesroh is exercised in the yard led by a man on horseback

Sentence: 'several vehicles at a traffic stop on a small downtown street'. Reverse all words of length '4' in the given sentence.

several vehicles at a traffic pots on a small downtown street