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: Sandy sang me a song.

Output: acceptable


Input: Consider Input: How much harder has it rained, when you see a faster flow in the river?

Output: acceptable


Input: Consider Input: Willy is taller than Bill by as much a Peter believes that Billy is taller than Dan.


Output: acceptable