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 person in bear feet standing on a skateboard'. Reverse all words of length '4' in the given sentence.
Example Output: a person in raeb teef standing on a skateboard

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: 'one of the three men has thrown the white frisbee'. Reverse all words of length '2' in the given sentence.
Example Output:
one fo the three men has thrown the white frisbee