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 snowboarder descending a snowpacked slope on a wintry day'. Reverse all words of length '2' in the given sentence.
Example Output: a snowboarder descending a snowpacked slope no a wintry day

Example Input: Sentence: 'a guy is jumping off a skateboard in the air'. Reverse all words of length '1' in the given sentence.
Example Output: a guy is jumping off a skateboard in the air

Example Input: Sentence: 'a man flying a very tall kite into the sky'. Reverse all words of length '6' in the given sentence.
Example Output:
a man gniylf a very tall kite into the sky