Definition: 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.
Input: Sentence: 'a stop sign is displayed with a camaro going through the intersection in the background'. Reverse all words of length '4' in the given sentence.

a pots ngis is displayed htiw a camaro going through the intersection in the background