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.

Example Input: Sentence: 'an assortment of chinese dinner options are arranged'. Reverse all words of length '8' in the given sentence.
Example Output: an assortment of chinese dinner options are degnarra

Example Input: Sentence: 'a train billowing smoke as it crosses a river by bridge'. Reverse all words of length '1' in the given sentence.
Example Output: a train billowing smoke as it crosses a river by bridge

Example Input: Sentence: 'people on field wearing extravagant outfits and stadium behind'. Reverse all words of length '5' in the given sentence.
Example Output:
people on dleif wearing extravagant outfits and stadium behind