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 solution presented itself yesterday.

Output: acceptable


Input: Consider Input: Every student answered any question.

Output: unacceptable


Input: Consider Input: While Rusty might leave in order to please Mag, he won't his father.


Output: unacceptable