阅世

阅 = 兑 + 门 : Yu the Great (yu) has to inspect (阅) a cash exchange booth (兑) in the elevator's bathroom (e4). He finds lots of problems and just as he is reading (阅) the rights to the owner, the owner opens a trap door (门) just below his feet to make him disappear.

世 = 廿 + L : Mnemonic symbol: the WTO or WHO.

Sherlock Holmes (sh) is cleaning a flower pot (廿) under the shower of the space station's bathroom (Ø4) with a loofah (L) because he didn't quite understand a poster next to the shower from the WHO (世) explaining dangers arising from different germs.

In this case, L is for loofah.