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: 'this donut has blue green and yellow confetti with white frosting on it'. Reverse all words of length '2' in the given sentence.

this donut has blue green and yellow confetti with white frosting no ti