預訂

预 = 予 + 页 : Yu the Great and Zai Yu are preparing their tax reports in advance in the space station's bathroom. Yu the Great is scribbling wildly on one sheet of paper after the other, and sheets of paper are flying all over the place. Zai Yu on the other hand just fell asleep and covered himself in a lot of sheets of paper. He covered himself with a sheet he made out of paper.

订 = 丁 + 讠 : Dorothy Gale (di) finds an advertising column (讠) in the engine's bathroom ((e)ng4) displaying a nail (丁). She instantly calls the number to order (订) a really hard nail (丁) for her loose flange.