AB |
BC |
OA |
a |
OB |
b |
OC |
c |
A.
| B.
| C.
| D.
|
AB |
BC |
OB |
OA |
OC |
OB |
OC |
3 |
2 |
OB |
1 |
2 |
OA |
c |
3 |
2 |
b |
1 |
2 |
a |
v |
v |
v |
AE |
1 |
3 |
AB |
AF |
1 |
4 |
AD |
AB |
a |
AD |
b |
AG |
A.
| B.
| C.
| D.
|
AD |
BC |
CE |
EB |
AD |
AE |
AB |
a |
AE |
b |
CD |
A.
| B.
| C.
| D.
|
AB |
BC |
CA |
AB |
AC |
BD |
CD |
OA |
OD |
AD |
NQ |
QP |
MN |
MP |
0 |
A.1 | B.2 | C.3 | D.4 |
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