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: I lent the book all the way to Tony.

Output: unacceptable


Input: Consider Input: This is the sort of problem which the sooner you solve the more easily you'll satisfy the folks up at corporate headquarters.

Output: acceptable


Input: Consider Input: He might have left.


Output: acceptable