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".

Q: Ellen conferred with Helen.

A: acceptable
****
Q: He threw the letter into the wastebasket.

A: acceptable
****
Q: Felicia sent the box out of the storeroom.

A:
unacceptable
****