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 plate wit some very tasty looking treats'. Reverse all words of length '6' in the given sentence.
Example Output: a plate wit some very tasty looking staert

Example Input: Sentence: 'a photo in an airport showing a backpack and a cell phone'. Reverse all words of length '8' in the given sentence.
Example Output: a photo in an airport showing a kcapkcab and a cell phone

Example Input: Sentence: 'a bike that is leaning up against a sign'. Reverse all words of length '2' in the given sentence.
Example Output:
a bike that si leaning pu against a sign