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: 'there are two men sitting on a park bench'. Reverse all words of length '5' in the given sentence.
Example Output: ereht are two men sitting on a park hcneb

Example Input: Sentence: 'a person going on a slop jump on skis'. Reverse all words of length '6' in the given sentence.
Example Output: a nosrep going on a slop jump on skis

Example Input: Sentence: 'two bananas nuts and oats on a wooden table'. Reverse all words of length '5' in the given sentence.
Example Output:
two bananas nuts and oats on a wooden elbat