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 very large truck with people in back on a city street'. Reverse all words of length '6' in the given sentence.
Example Output: a very large truck with elpoep in back on a city teerts

Example Input: Sentence: 'a couple of men on a court holding tennis rackets'. Reverse all words of length '2' in the given sentence.
Example Output: a couple fo men no a court holding tennis rackets

Example Input: Sentence: 'a personal size pizza with lots of toppings'. Reverse all words of length '5' in the given sentence.
Example Output:
a personal size azzip with lots of toppings