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:
The meeting began at 4 P.M.

Ex Output:
acceptable


Ex Input:
Because John persuaded Sally to, he didn't have to talk to the reporters.

Ex Output:
acceptable


Ex Input:
It's obvious that, although he's a nice guy, John isn't too bright.

Ex Output:

acceptable