https://github.com/davepinch/pinchy.cc/blob/master/content/fragments/each-chat-room-has-ten-people-except-one-of-them-is-from-the-next-chat-room-over.md
Hexadecagon (Wikipedia) In mathematics, a hexadecagon (sometimes called a hexakaidecagon or 16-gon) is a sixteen-sided polygon.