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:
John knows whose book Mary bought and Tom talked.

Ex Output:
unacceptable


Ex Input:
Tamara poured the bowl with water.

Ex Output:
unacceptable


Ex Input:
What does every student buy?

Ex Output:

acceptable