富於

富 = 宀 + 畐 : Frieda Fox (fu) is very rich (富), so she ordered a golden graduation cap (宀) for her graduation. When the cap arrives though she doesn't pay any attention to it: in reality she just wanted to pop the bubble wrap (畐) In the space station's bathroom (Ø4).

富 = 宀 + 畐 : Frieda Fox (fu) is very rich (富), so she ordered a golden graduation cap (宀) for her graduation. When the cap arrives though she doesn't pay any attention to it: in reality she just wanted to pop the bubble wrap (畐) In the space station's bathroom (Ø4).

于 = 亅 + 二 : Mnemonic symbol: prepositions (in, at, on, to, ...) are what glue the sentence together. Honey is as sticky as glue, so I'll represent 于 by a honey jar.

Yu the Great (于) was assigned to repair the electronics of the space station's kitchen (Ø2), but instead he was snacking honey from a honey jar (于). Unfortunately his capacitor (二) got stuck in the honey and now he has to use a crowbar (亅) to lever it out.