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 teacher ordered the two boys both to pay close attention.

Ex Output:
acceptable


Ex Input:
The more contented the nurses began to believe that we were going to pretend to be, the more angry we grew at the doctors.

Ex Output:
unacceptable


Ex Input:
The birds devour the worm.

Ex Output:

acceptable