a |
b |
c |
a |
b |
c |
0 |
a |
b |
c |
a |
b |
a |
c |
a |
b |
c |
0 |
c |
a |
b |
a |
b |
c |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
c |
a |
b |
a |
a |
b |
b |
c |
2 |
2 |
AB |
AC |
CA |
CB |
AB |
AC |
BA |
BC |
BA |
BC |
CA |
CB |
AB |
AC |
BA |
BC |
CA |
CB |
A.(1)(4) | B.(2)(4) | C.(3)(4) | D.(1)(2)(3) |
AB |
CD |
A.
| B.1 | C.2 | D.4 |
AB |
OC |
OC |
a |
b |
3 |
π |
2 |
a |
b |
c |
a |
b |
c |
AP |
AB |
OP |
AB |
PA |
PB |
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