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 gave Mary, and Joan presented to Fred, books which looked.

Output: acceptable


Input: Consider Input: If he has to wait, John gets angry.

Output: acceptable


Input: Consider Input: I cut the bread with this knife.


Output: acceptable