OA |
a |
OB |
b |
a |
b |
OD |
A.
| B.
| C.
| D.
|
AB |
b |
a |
DB |
2 |
3 |
CB |
CB |
2 |
3 |
AB |
AD |
5 |
9 |
AB |
5 |
9 |
b |
a |
OD |
OA |
AD |
a |
5 |
9 |
b |
a |
1 |
9 |
a |
b |
BC |
AB |
AC |
AB |
AC |
AM |
A.8 | B.4 | C.2 | D.1 |
a |
b |
2 |
a |
b |
a |
b |
a |
b |
a |
b |
AB |
BC |
0 |
OC |
e1 |
e2 |
AB |
e1 |
e2 |
BC |
e1 |
e2 |
CD |
e1 |
e2 |
e1 |
e2 |
e1 |
e2 |
MP |
PN |
1 |
6 |
MN |
OP |
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