刻絲

刻 = 亥 + 刂 : Mnemonic symbol: an engraver.

The boar cannot believe it when it meets Karl Marx in the elevator's bathroom! Bewildered it asks for an autograph but has nothing except for a kitchen knife and an engraver. It takes Karl Marx a quarter of an hour to engrave his message in the kitchen knife: "Dear boar, keep on fighting capitalism! Yours, Karl."

丝 = 幺 + 一 : Socrates locked himself out of the space station! To call the other astronauts for help, he attaches some silk cloth to a flute and waves it like a flag.