A joke about homophonic typos.

A gentleman is ignorant and has no ink in his chest, but he calls himself an "ancestral famous doctor" and has the function of "rejuvenating his hands". One day, a gentleman took an examination held by the Medical and Political Department to apply for a medical license. There is a question on the test paper: "A man saw redness, swelling and heat pain in his anus at six o'clock ... when he was diagnosed with a major disease?" This gentleman doesn't understand medicine, and he can't understand it after racking his brains. Just when I was at my wit's end, I suddenly felt "an epiphany". Isn't redness inflammation? So with a stroke of a pen, I decided to "talk about anus". When the marking teacher saw it, he was really in distress situation. He raised his pen and criticized, "Bullshit!"