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 road decorated for christmas and trees without leaves'. Reverse all words of length '1' in the given sentence.
Example Output: a road decorated for christmas and trees without leaves

Example Input: Sentence: 'a small clean unoccupied bathroom on public transportation'. Reverse all words of length '10' in the given sentence.
Example Output: a small clean deipucconu bathroom on public transportation

Example Input: Sentence: 'a grey cat is sitting on a bench'. Reverse all words of length '2' in the given sentence.
Example Output:
a grey cat si sitting no a bench