Clean unused chunks in minecraft

java -jar mcaselector.jar --mode delete --world "world" --query "InhabitedTime < 5 minutes

$\frac{\partial u}{\partial t} = h^2 \left( \frac{\partial^2 u}{\partial x^2} + \frac{\partial^2 u}{\partial y^2} + \frac{\partial^2 u}{\partial z^2}\right)$

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