丁是丁，卯是卯

丁 = 一 + 亅 : Mnemonic symobl: a nail. 一 is the head of the nail and 亅 is the shaft. The point of the nail is already a bit bent.

Dorothy Gale (di) balances a flute (一) on a crowbar (亅) in front of the engine ((e)ng1). For this trick, she wins the fourth (丁) place in an artists competition and gets a quarter (丁) of a pizza as prize. Unfortunately, there is a big nail (mnemonic symbol for 丁) on the pizza slice.

是 = 旦 + 龰 : Mnemonic symbol: a skull, from "to be or not to be".

Sherlock Holmes (sh) starts his day in the space station's bathroom (Ø4) with a mug of coffee (旦). Holding a skull (mnemonic symbol for 是) in his hands, he asks himself "to be, or not to be" (是). He wonders if he can make the skull come back to life using lots of coffee, and injects coffee from his mug into the skull using a syringe (龰).

是 = 日 + 下 + 人 : Mnemonic symbol: a skull, from "to be or not to be".

Sherlock Holmes (sh) watches the Neanderthal Man (人) trying to climb to the sun (日) on a ladder (下) in the space station's bathroom (Ø4). Sherlock is afraid that he'll open the window, so he puts on a big skull (是) and scares him off.

卯 = 丿 + 厶 + 卩 : Mnemonic symbol: a rabbit.

Mahatma Gandhi entertains a baby rabbit and a baby seal inside of the aorta. He put on a fake nose and stuck a banana in each hole of the fake nose, and the bananas fit like tenons put into mortises.