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: 'a black and white clock reads serving central oregon'. Reverse all words of length '3' in the given sentence.
Example Output: a black dna white clock reads serving central oregon

Example Input: Sentence: 'there is an entree on a place with spoon'. Reverse all words of length '6' in the given sentence.
Example Output: there is an eertne on a place with spoon

Example Input: Sentence: 'a man holding a very large chocolate doughnut'. Reverse all words of length '3' in the given sentence.
Example Output:
a nam holding a very large chocolate doughnut