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: 'pineapple and hot dog skewers are shown as appetizers'. Reverse all words of length '9' in the given sentence.
Example Output: elppaenip and hot dog skewers are shown as appetizers

Example Input: Sentence: 'a bathroom with a white bath tub under a mirror'. Reverse all words of length '5' in the given sentence.
Example Output: a bathroom with a etihw bath tub rednu a mirror

Example Input: Sentence: 'a person riding a dirt bike on a field of green grass'. Reverse all words of length '6' in the given sentence.
Example Output:
a nosrep gnidir a dirt bike on a field of green grass