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".

Ex Input:
Steve tossed the ball.

Ex Output:
acceptable


Ex Input:
It was John's that I stole bike.

Ex Output:
unacceptable


Ex Input:
Fluffy is sick, which I'm not sure you know Sarah expects me to believe Joan realizes.

Ex Output:

acceptable