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 white bear stuff toy sitting next to a mini chair and book'. Reverse all words of length '1' in the given sentence.
Example Output: a white bear stuff toy sitting next to a mini chair and book

Example Input: Sentence: 'a red double decker bus parked next to a brick building'. Reverse all words of length '4' in the given sentence.
Example Output: a red double decker bus parked txen to a brick building

Example Input: Sentence: 'a public bus held in higher focus then the rest of the picture'. Reverse all words of length '2' in the given sentence.
Example Output:
a public bus held ni higher focus then the rest fo the picture