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 know which book Mag read, and which book Bob discussed after I had.

Ex Output:
unacceptable


Ex Input:
Nixon's behavior gave an idea for a book to every journalist living in New York.

Ex Output:
acceptable


Ex Input:
I searched for treasure in the cave.

Ex Output:

acceptable