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".

[Q]: I am frightened of tigers.
[A]: acceptable


[Q]: The teacher ordered the two boys both to pay close attention.
[A]: acceptable


[Q]: Tom hid the manuscript in the cupboard.
[A]:
acceptable