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".

Ex Input:
Different teams beat the Red Sox and were beaten by the Giants.

Ex Output:
acceptable


Ex Input:
John gave Mary, and Joan presented to Fred, books which looked.

Ex Output:
acceptable


Ex Input:
John gave a book to the students.

Ex Output:

acceptable