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 single round bread object frying in oil'. Reverse all words of length '1' in the given sentence.
Example Output: a single round bread object frying in oil

Example Input: Sentence: 'the tour buses are driving away from the building'. Reverse all words of length '5' in the given sentence.
Example Output: the tour sesub are driving away from the building

Example Input: Sentence: 'a group of people sitting on a couch watching some tv'. Reverse all words of length '6' in the given sentence.
Example Output:
a group of elpoep sitting on a couch watching some tv