PA |
PB |
PC |
0 |
PA |
PB1 |
PC1 |
0 |
1 |
7 |
S |
7 |
1 |
3 |
S |
3 |
1 |
3 |
1 |
7 |
S |
21 |
| ||||||
|
3 |
11 |
3 |
11 |
PA |
PB |
PC |
A.
| B.
| C.
| D.
|
AB |
CD |
BC |
OA |
OB |
OC |
OA |
OB |
OA |
OC |
OA |
OB |
OC |
3 |
OC |
OA |
OB |
AB |
BD |
DC |
AB |
BD |
BD |
DC |
AB |
BD |
BD |
DC |
AB |
DC |
AC |
A.2 | B.2
| C.4 | D.4
|
a |
e |
e |
b |
e |
e |
e |
e |
c |
e |
e |
d |
a |
b |
c |
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