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[https://blog.terryvogelsang.tech/nuit-du-hack-2017-quals-purple-posse-market/](https://blog.terryvogelsang.tech/nuit-du-hack-2017-quals-purple-posse-market/)

Original writeup (https://blog.terryvogelsang.tech/nuit-du-hack-2017-quals-purple-posse-market/).