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".

Example Input: Different teams beat the Red Sox and were beaten by the Giants.
Example Output: acceptable

Example Input: How do you wonder which problem to solve?
Example Output: unacceptable

Example Input: Those books slide across the table easily.
Example Output:
acceptable