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 tennis player is swinging at a tennis ball'. Reverse all words of length '2' in the given sentence.
Example Output: a tennis player si swinging ta a tennis ball

Example Input: Sentence: 'a young man is sitting on the side of a bus eating a hot dog'. Reverse all words of length '3' in the given sentence.
Example Output: a young nam is sitting on eht side of a sub eating a toh god

Example Input: Sentence: 'a person that is skateboarding on a ramp'. Reverse all words of length '13' in the given sentence.
Example Output:
a person that is gnidraobetaks on a ramp