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: It was John's that I stole bike.

Output: unacceptable


Input: Consider Input: Carla slid those books across the table.

Output: acceptable


Input: Consider Input: The curtain which Fred tore in rolling up was the kind gift of my maternal Aunt Priscilla.


Output: acceptable