巧

巧 = 丂 + 工 : The Queen of Hearts (qi) arrived just at the right time (巧) in the aorta (ao3). When she arrived a big chocolate (巧) house, reinforced using steel beams (工), was about to melt and collapse. Just at the right time the Queen of Hearts put a huge breathing mask (丂) under the collapsing structure to collect the chocolate, filter it with the mask and reuse it.

Mnemonic symbol: a breathing mask.

The air inside of the aorta is so bad that Karl Marx needs a breathing mask to breathe freely.

工 = 二 + 丨 : Mnemonic symbol: a steel beam, since 工 looks like the cross section of a steel beam. In front of the engine ((e)ng1), Gitta Giraffe (gu) is doing some hard work: She's stacking a capacitor (二) on a dinosaur bone (丨) on a capacitor (二). She's not very successful, but then she gets the idea to use steel beams (工) as support.