默記

默 = 犬 + 黑 : Mahatma Gandhi (m) and the Saint Bernhard dog (犬) are training hard in the observatory's bathroom (o4). They are taking turns of making awful noises on a blackboard (黑), and they train to remain silent (默) instead of screaming out loud.

记 = 己 + 讠 : In the space station's bathroom, Joan of Arc sees an advertisement on an advertising column. There are some butcher's hooks advertised which she thinks will be useful on her quest against the king of England, so she takes a voice memo to remind herself to obtain some of the butcher's hooks.