Layout: 1 R-Y, 2 Y-R, 3 Y-Y, 4 Y-Y, 5 Y-R, 6 R-Y, 7 Y-Y, 8 R-Y, 9 R-R, 10 Y-Y, 11 R-R, 12 Y-R, 13 Y-Y, 14 Y-Y, 15 Y-R, 16 Y-Y, 17 R-R, 18 Y-Y