P K
* *
t1 P K
FSB P *
CAC X
P K CAC X
R3 P K
R4 P K
R2 P K
R2 * *
R1 * *
R1 P K
R2 P *
R3 * *
R3 PK
R2 PK
R4 PK nCAC
R5 PK
P K crossed