I enrolled in what I thought was a magic class. The topic for the lecture was supposed to be card tricks, but it turned out the be a lecture on how to cheat at card games. The instructor gave each student three cards that had different values and suits on each half of the card. 6 was the common value on all of them. I do not recall the value on the other half for any of them other than one that had 18. I also received 3 peacock feathers with numbers and suits on them just like regular playing cards. The task that I was working on was finding the optimum arrangement of the three cards to hide on my leg, trapped by the upper part of my sock. I had to arrange them in a way that I could find the exact card that I wanted without looking at it. The purpose of the feathers was never explained, but I had to conceal them along with the cards.