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 bathroom area with writing on the wall and a mirror'. Reverse all words of length '4' in the given sentence.
Example Output: a bathroom aera htiw writing on the llaw and a mirror

Example Input: Sentence: 'two baseball players with long hair and beards are posing with a smile'. Reverse all words of length '1' in the given sentence.
Example Output: two baseball players with long hair and beards are posing with a smile

Example Input: Sentence: 'a woman is on snow skis against a dark sky'. Reverse all words of length '7' in the given sentence.
Example Output:
a woman is on snow skis tsniaga a dark sky