さい, ざい
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Give shellfish to a genius and they'll have no problem accumulating wealth. Geniuses can make loads of money out of pretty much anything, so shellfish are like easy-mode.
The wealth comes pouring in, once the genius's cyborg (さい) is unveiled. It's a half-man, half-shellfish cyborg that's making him rich! It can even play the xylophone (ざい)!