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".

Input: Consider Input: Do not use these words in the beginning of a sentence.

Output: acceptable


Input: Consider Input: Fred threw the ball under the porch.

Output: acceptable


Input: Consider Input: It is possible that Sam didn't pick those packages which are to be mailed tomorrow up.


Output: unacceptable