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: I've never seen the one taller man than my father.

Output: unacceptable


Input: Consider Input: Fred feels fine.

Output: acceptable


Input: Consider Input: He gets angry, the longer John has to wait.


Output: unacceptable