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: A choir sang in the church.

Output: acceptable


Input: Consider Input: Suddenly an ugly old man entered the hall.

Output: acceptable


Input: Consider Input: Mickey looked the reference up.


Output: acceptable