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: Every man who said he would buy some salmon did.

Output: acceptable


Input: Consider Input: Robert thinks that student should eat asparagus.

Output: acceptable


Input: Consider Input: The ship sank beneath the waves.


Output: acceptable