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 man sitting at a table and looking past the microphone'. Reverse all words of length '4' in the given sentence.
Example Output: a man sitting at a table and looking tsap the microphone

Example Input: Sentence: 'a hand is holding an iced doughnut with sprinkles'. Reverse all words of length '1' in the given sentence.
Example Output: a hand is holding an iced doughnut with sprinkles

Example Input: Sentence: 'the man is looking at the candles on a small cake'. Reverse all words of length '5' in the given sentence.
Example Output:
the man is looking at the candles on a llams cake