a |
b |
c |
a |
b |
2 |
3 |
c |
a |
c |
b |
a |
b |
2 |
3 |
a |
b |
a |
b |
2 |
3 |
1 |
2 |
a |
b |
a |
a |
b |
b |
1 |
2 |
a |
b |
a |
b |
c |
a |
b |
c |
a |
b |
c |
c |
a |
c |
b |
c |
a |
b |
c |
a |
b |
a |
b |
c |
1 |
2 |
1 |
2 |
a |
b |
c |
c |
a |
c |
b |
1 |
2 |
1 |
2 |
a |
b |
c |
c |
a |
c |
b |
1 |
2 |
1 |
2 |
π |
2 |
CA |
CB |
A.
| B.
| C.1 | D.3 |
a |
b |
b |
5 |
b |
a |
a |
b |
a |
b |
2 |
b |
PA |
PM |
PA |
PB |
PC |
PA |
PB |
PA |
PC |
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