AIDS is a serious thing, but we may look at an enigma about it after all.

Listen to me, says Doc Helmut P. to the girl and the three guys standing in front of him.
I did the tests, unfortunately my secretary mixed up the analysis.
Indeed, out of the four of you, exactly one got HIV.

Alice, Bob, Charles, and Dylan are confused, because, Alice is too charming,
her mother stole stars from the sky to put them into her eyes, and so on, and each of
the three guys wanted to visit Wonderland this night with her.

They organize a meeting and find an agreement : they will protect themselves!
However, they return their pockets, and find only two condoms.

How can everyone reach his goal without contaminating anyone?


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