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: Jennie smiled the microwave.

Answer: unacceptable


Question: I've seen as much of a coward as Frank.

Answer: unacceptable


Question: The teacher made students happy.

Answer:
acceptable