instruction:
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".
question:
The students looked the high stairs up.
answer:
unacceptable


question:
It is the folks up at corporate headquarters who the sooner you solve this problem, the more easily you'll satisfy.
answer:
unacceptable


question:
I sent the package to London.
answer:

acceptable