X| | | | | |B|B|B| | | | | |Y
 |S|S|S|S|S|S|S|S|S|S|S|S|S| 
 |S|C| |C| |C| |C| |C| |C|S| 
B|S|S|S|S|S|S|S|S|S|S|S| |S|B
4|S|C| |C| |C| |C| |C|S|C|S|4
 |S| |S|S|S|S|S|S|S| |S| |S| 
 |S|C|S|C| |C| |T|S|C|S|C|S| 
6|S| |S| |S|S|S|S|S| |S| |S|6
6|S|C|S|C| |C| |C| |C|S|C|S|6
B|S| |S|S|S|S|S|S|S|S|S| |S|B
 |S|C| |C| |C| |C| |C| |C|S| 
 |S|S|S|S|S|S|S|S|S|S|S|S|S| 
T| | |B|7| |7| |7| |7|B| | |T