樕

木 = 八 + 十 : Mnemonic symbol: a Christmas tree. Malte Monkey is putting up a Christmas tree (木) in the bathroom of the space station (Ø4). He's using a cross (十) as a base to put the tree on, and decorates the tree with eight-balls (八).

欶 = 束 + 欠 : Mnemonic symbol: a drinking bottle, one of those where you have to suck to drink. Sheldon Shrimp (shu) finds a drinking bottle (欶) in the observatory's bathroom (o4) over a bundle of firewood (束). There is a small fire to keep the bottle's content warm. Sheldon doesn't hesitate, grabs the bottle and empties it, sucking (欶) and drinking (欶) the warm beverage. He carelessly throws an IOU note (欠) towards the bundle of firewood, but it almost instantly touches the fire and burns to ashes.