Input (grade 6): An early Classic (460-480 A.D.) period Mayan grave from the site of Rio Azul, Guatemala, had containers with Mayan writing for cacao on them with remains of a chocolate drink.
Output (grade 6): An early Classic (460-480 A.D.) period Mayan grave from the site of Rio Azul, Guatemala, had cups with Mayan writing for cacao on them with traces of an ancient chocolate drink.