北屯市

北 = 丬 + 匕 : A compass rose. In the Eiffel Tower, Beelzebub tries to build a compass. As a baseplate he uses a piece of wood, on which he sticks the north pike of a compass rose. On the south pike he balances a ladle, which is supposed to adjust itself to earth's magnetic field.

屯 = 一 + 凵 + 乚 : Mnemonic symbol: a trident (屯).

市 = 亠 + 巾 : Mnemonic symbol: a supermarket.

Sherlock Holmes (sh) started a supermarket (市) in the space station's bathroom (Ø4), but all he has for sale right now are berets (亠) and towels (巾). He should have opened it at the beach!