共同篩選

共 = 井 + 八 : A giant eight-ball is blocking the well in the engine's bathroom. Joining forces together with the communist, Gitta Giraffe and he are able to push the eight-ball off and make the well available to the public again.

共 = 井 + 八 : Mnemonic symbol: the communist.

同 = 冂 + 𠮛 : Tommy Turtle (tu) is stapling (冂) a magical scroll (𠮛) to the wall of the engine's kitchen ((e)ng2). On it he wrote that he's looking for two twins (mnemonic symbol for 同).

筛 = ⺮ + 师 : One time in front of the airplane (ai1) Sherlock Holme's (sh) teacher (师) showed him how to filter (筛) urine into drinkable water using just a bamboo stick (⺮). That one was actually a prank to make Sherlock Holmes drink his own urine.

选 = 先 + 辶 : Xu Xian (xu) squired the FLOTUS (先) to go shopping, but inside of the anthill (an3) he soon regrets his decision as he has to help the FLOTUS select (选) one pair of gladiator sandals (辶) out of hundreds of similar looking pairs.