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: Nora sent at the book to Peter.

Answer: unacceptable


Question: I insist on seeing through all the students who had started out the term in my class.

Answer: unacceptable


Question: The dog flopped in the comer.

Answer:
acceptable