This program displays the flow of the cards, when swaps are made according to the rules of Al Zimmermann's Topswop contest. The X-coordinate indicates the position in the heap, the Y-coordinate  shows the card's number. After pushing the button "Read" a permutation in Al Zimmermann's format can be entered. At program start a predefined example is used. The buttons ">" and "<" perform single swaps forward or backward. Automatic animation is controlled by "Start/Stop", "Forward/Back", "Slower" and "Faster".
Vau is the German name for the letter V. It was chosen, because good solutions frequently ended with a V-shaped diagram. 

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