刂
=
丨
+
亅
:
Mnemonic symbol: a kitchen knife. Don Quixote (d) is showing off his special knifes in front of the aorta (ao1). One is made from a dinosaur bone (丨), and the other is made from a crowbar (亅).
叕
=
又
:
Mnemonic symbol: a comfy mattress made out of boxing gloves.
Julian Giant Squid (zhu) is lacking (叕) a place to rest in the observatory's kitchen (o2). He decides to make a mattress by joining (叕) a lot of boxing gloves (又) using super glue.