You're given a sentence and your task is to classify whether the sentence is acceptable or not. Any sentence which is grammatically correct, has a naturalistic text, is written by a native speaker and which minimizes superfluous content is acceptable, otherwise unacceptable. If the sentence is acceptable then write "acceptable", otherwise "unacceptable".

Example Input: The ship's sinking to collect the insurance was very devious.
Example Output: unacceptable

Example Input: A big green insect flew into the soup.
Example Output: acceptable

Example Input: We proclaimed sincerely to the public John to be a hero.
Example Output:
unacceptable