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: The hat which that I brought seemed strange to the nurse was a fedora.
Example Output: unacceptable

Example Input: Students objected to the teacher.
Example Output: acceptable

Example Input: John is as intelligent as Mary.
Example Output:
acceptable