Mem, the thirteenth letter, means both “water” and “map” in English. Mem’s head’s vary in shapes depending on which map of a body of water they are based on. They make up 8.2% of the population. Top Mem’s head is in the shape of the Black Sea, and the flags on her tail are of the countries bordering the Black Sea. Mem live in channel 13, which is between mercury and mars. The weather is hot but similar to the weather on earth. Mem’s magic consists of synchronized swimming with other Mem so that they spell what they want to create, and swimming around until small whirlpools form and speaking into them like megaphones.