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 two story bus with oriental writings on the side is parked on a street near many pedestrians as well as a fenced area and foliage'. Reverse all words of length '4' in the given sentence.

a two story bus htiw oriental writings on the edis is parked on a street raen ynam pedestrians as llew as a fenced aera and foliage