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 believe that the world is round strongly.

Output: unacceptable


Input: Consider Input: The harder it rains, how much faster a flow do you see in the river?

Output: acceptable


Input: Consider Input: Sylvia will be slapping Jeff upside the head in martial arts class.


Output: acceptable