“Are you giving out something?”, someone asked. “Is this a lottery?”, someone else said.
“Maybe”, the teacher mysteriously answered. “Something like that”.
When the teacher had paraded around the classroom, he announced: “We are going to choose random pairs of students, so you can do your exercises today. Some of you will appreciate the help, and I hope you all make it for the best, if you feel uncomfortable with Lady Fortune.
A few groans were heard.