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".
--------
Question: She speaks enough clearly to be understood.

Answer: unacceptable


Question: Tom picked these grapes, and I washed these grapes, and Suzie will prepare these grapes.

Answer: acceptable


Question: John bought a book for the student.

Answer:
acceptable