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".

You will Bob believe.
unacceptable

Martha climbed the mountain.
acceptable

Fifteen dollars in a week are not much.

unacceptable