Nephite Monetary System

{r},{t}: Add {u}{u}{u}
{u}, {t}: Add {w}{w}{w}
{w},{t}: Add {g}{g}{g}
{g},{t}: Add {r}{r}{r}

Now the reckoning is thus—a senine of gold,
a seon of gold, a shum of gold, and a limnah
of gold.