Only the mapmakers are happy with the geography of the island of Quattroslabia, whose four nations require only two colors. The rest of industry suffers because trade between two countries needs to traverse as many as two intervening ones. Yet on the island of Tetrahelminthia, whose four countries are congruent to Quattroslabia's, only the mapmakers are unhappy, since each country borders the other three. Cut apart this map of Quattroslabia, and reassemble the four pieces (without overlapping and without "lakes") to form the map of Tetrahelminthia. (Geometry by Scott Kim.)