static private $regionCols = array(
                        1, 1, 1, 1, 1, 1, 1, 1, // Number of regions per column
                        1, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 4, 4, 6, 6, 6,
                        1, 2, 1, 2, 2, 2);