3 swaps => Y0 Y1 Y2 X0 X1 X2
 4 swaps => Y0 Y1 Y2 Y3 X0 X1
 4 swaps => Y0 Y1 X0 X1 X2 X3
 5 swaps => Y0 Y1 Y2 Y3 Y4 X0
 5 swaps => Y0 X0 X1 X2 X3 X4
16 swaps => Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X0 X1 X2 X3 X4 X5 X6 X7 X8 X9
16 swaps => Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 X0 X1 X2 X3 X4 X5 X6 X7