入境問俗

入 = 丿 + ㇏ : Mnemonic symbol: an enter key like on a computer keyboard.

There is a special area in the space station's bathroom (Ø4) which is filled with bananas (丿), but you have to hit an enter key (入) to enter (入). Rachel Rhinoceros (ru) uses a finger (㇏) to press the button and get access to the bananas.

境 = 土 + 竟 : Joan of Arc wants to start her own kingdom and starts with claiming her own territory in the engine's bathroom. She created some walls out of mud but because she has no money to pay, she has a very inexpensive border control consisting of Jacks in their boxes.

问 = 口 + 门 : Willy Walrus sees a mouthwatering mandarin hanging over a door in the floor of the encampment's bathroom. He asks himself: "is it a trap?"

俗 = 亻 + 谷 : Rosa Luxemburg (亻) just arrived at the space station and in the entrance (Ø2) she sees Susan Saint Bernard (su) hanging out in her web. Rosa brought some popcorn (谷) as a present and asks Susan Saint Bernard whether she wants to watch a movie, which she does. Both of them think "when in Rome, do as the Romans do" (俗), so Rosa climbs up to Susan Saint Bernard in her web and Susan Saint Bernard eats some of Rosa's popcorn.