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".

Input: Consider Input: John's refusing the offer is shocking.

Output: acceptable


Input: Consider Input: Which city and to which conference did Bill go to?

Output: unacceptable


Input: Consider Input: On the horizon appeared a large ship.


Output: acceptable