cC(2)FiVWj
QO˖
|
Q
|
R
|
R
|
R
|
R
|
PS
|
SO˖
|
S
|
R
|
S
|
S
|
P
|
PU
|
UO˖
|
R
|
S
|
R
|
S
|
R
|
PV
|
WO˖
|
P
|
R
|
R
|
S
|
S
|
PT
|
POO˖
|
S
|
S
|
Q
|
R
|
R
|
PU
|
v |
VW
|