Pinyin final: "o2"

逻 = 罗 + 辶 : Lenny Lemur (lu) is patrolling the observatory's kitchen (o2) in his patrol boat (逻). He is patrolling three gates: behind two of the gates there is one pile of gauze (罗) respectively, but behind the last door there is a pair of beautiful gladiator sandals (辶). He will ask any visitor to choose one of the gates, then open another one and show the gauze behind it. Any visitor who doesn't get the logic (逻) why it is better to choose the remaining gate then is not allowed to enter the castle.

浊 = 氵 + 虫 : Julian Giant Squid (zhu) is drinking from a bottle of water (氵) in the observatory's kitchen (o2), but he finds that the water is very muddy (浊) because there are so many mosquitoes (虫) in the bottle.

驳 = 爻 + 马 : Beelzebub (b) is delivering a pile of pliers (爻) to observatory. In the kitchen (o2) a unicorn (马) is pulling the barge (驳) into the castle.