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: They let him go yesterday, he.

Output: unacceptable


Input: Consider Input: They read the every book.

Output: unacceptable


Input: Consider Input: If it, I've lost $500.


Output: unacceptable