# xd 4

By [Untitled](https://paragraph.com/@0x415b600cdfa1165e81113714703bee0ed8c5ab0f) · 2024-02-09

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I am taken from a mine, and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

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*Originally published on [Untitled](https://paragraph.com/@0x415b600cdfa1165e81113714703bee0ed8c5ab0f/xd-4)*