From Toncha Communication:
The player arranges twelve stacks of three face down cards so as to see all three cards. The top card of each stack is considered a free one. It also can be added to another stack if it has the same rank like a top card of the stack and there is a free place in this stack. You can select the pack of 36 or 52 cards. This realization suggests variant of the cards' pack by Albrecht Durer, the greatest artist of the Northern Renaissance.