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: 'an orange and white bus driving down a city street'. Reverse all words of length '1' in the given sentence.
Example Output: an orange and white bus driving down a city street

Example Input: Sentence: 'a man on skis is under an empty ski lift'. Reverse all words of length '1' in the given sentence.
Example Output: a man on skis is under an empty ski lift

Example Input: Sentence: 'a young man in red shorts is riding his skateboard'. Reverse all words of length '2' in the given sentence.
Example Output:
a young man ni red shorts si riding his skateboard