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:
I've seen as much of a coward as Frank.

Ex Output:
unacceptable


Ex Input:
We peered around the room.

Ex Output:
acceptable


Ex Input:
The one whose I stole bike was John's.

Ex Output:

unacceptable