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

Output: unacceptable


Input: Consider Input: Enough Sally eats caviar.

Output: unacceptable


Input: Consider Input: Fred is thinking about whether he should stay in Seoul.


Output: acceptable