OA |
a |
OB |
b |
a |
b |
OP |
OQ |
a |
b |
OP |
OQ |
a |
b |
OP |
OQ |
OA1 |
OA2 |
OAn-1 |
n-1 |
2 |
a |
b |
OP |
OA |
AP |
OA |
1 |
3 |
OB |
OA |
OP |
2 |
3 |
a |
1 |
3 |
b |
OQ |
1 |
3 |
a |
2 |
3 |
b |
OP |
OQ |
a |
b |
| ||||
2 |
OA1 |
OA2 |
OA3 |
3(
| ||||
2 |
OAk |
OAn-k |
OA |
OB |
OA1 |
OA2 |
OAn-1 |
n-1 |
2 |
a |
b |
1 |
4 |
a | 2 n |
1 |
2 |
1 |
4 |
OAk |
OAn-k |
OA |
OB |
OAk |
OA |
AAk |
OAn-k |
OB |
BAn-k |
AAk |
BAn-k |
AAk |
BAn-k |
OAk |
OAn-k |
OA |
OB |
OA1 |
OA2 |
OA3 |
OAn-2 |
OAn-1 |
OAn-1 |
OAn-2 |
OA2 |
OA1 |
OA1 |
OAn-1 |
OA2 |
OAn-2 |
OAn-1 |
OA1 |
OA |
OB |
OA1 |
OA2 |
OAn-1 |
n-1 |
2 |
a |
b |
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