X| | | | | | |S| | | | | | |Y
B|S|B|S|B|S|B|S|B|S|B|S|B|S|B
4| | | | |S| |T| |S| | | | |4
B|S|B|S| |S|S|S|S|S| |S|B|S|B
C|C|C|B| | |S|S|S| | |B|C|C|C
C|S|C|S| |S|C|S|C|S| |S|C|S|C
C|C|C|B| |S| |B| |S| |B|C|C|C
B|S|B|S| |S|C|S|C|S| |S|B|S|B
7| | | | |S|1|B|1|S| | | | |7
B|S|B|S| |S|C|S|C|S| |S|B|S|B
 |C|C|B| |S| |B| |S| |B|C|C| 
 |S|C|S| |S|C|S|C|S| |S|C|S| 
T| | |B|7|S| |T| |S|7|B| | |T