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".

Example Input: Ellen conferred for Helen to come.
Example Output: unacceptable

Example Input: We went through the woods and over the bridge.
Example Output: acceptable

Example Input: That Sam didn't pick those packages which are to be mailed tomorrow up is possible.
Example Output:
unacceptable