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 deep dish pizza with various toppings next to a cutting utensil'. Reverse all words of length '7' in the given sentence.

a deep dish pizza with suoirav toppings next to a gnittuc lisnetu