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 person jumping up into the air on a skateboard'. Reverse all words of length '1' in the given sentence.
Example Output: a person jumping up into the air on a skateboard

Example Input: Sentence: 'a woman walks a horse wearing a blanket'. Reverse all words of length '7' in the given sentence.
Example Output: a woman walks a horse gniraew a teknalb

Example Input: Sentence: 'a black bear travelling in the brush next to a road'. Reverse all words of length '1' in the given sentence.
Example Output:
a black bear travelling in the brush next to a road