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: To train his horse would be desirable.
Example Output: acceptable

Example Input: It is the folks up at corporate headquarters who the sooner you solve this problem, the more easily you'll satisfy.
Example Output: unacceptable

Example Input: Mary persuaded to leave John.
Example Output:
unacceptable