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: Thunder frightens the dog.
Example Output: acceptable

Example Input: I didn't realize that it had rained and some crops had been destroyed.
Example Output: acceptable

Example Input: A variety of styles have been in vogue for the last year.
Example Output:
unacceptable