Suspicious things happening in the library

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You fall asleep while studying in the library.
I'm trapped in the library on the eighth floor.
I need to escape.
You can take a test the next day
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The game is very simple
If there's an abnormality, you can get on the elevator behind you
If there is no abnormality, you can board the elevator in front of you
But I'm not sure if the anomaly is going to work
I wish you all the best
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