市镇

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!

镇 = 真 + 钅 : James II of England (zh) had the replicator (真) create too much food and now he forces (镇) it down the encampment's toilet ((e)n4) using a golden harpoon (钅).