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: They wouldn't leave soon.

A: acceptable
****
Q: How much harder has it rained, when you see a faster flow in the river?

A: acceptable
****
Q: A bicycle lent to me.

A:
unacceptable
****