a |
b |
a |
b |
e |
a |
b |
e |
e |
|
|
|
| ||
5 |
2
| ||
5 |
BC |
a |
CA |
b |
AB |
c |
EF |
1 |
2 |
c |
1 |
2 |
b |
BE |
a |
1 |
2 |
b |
CF |
1 |
2 |
b |
1 |
2 |
a |
AD |
BE |
CF |
0 |
A.1 | B.2 | C.3 | D.4 |
e |
4 |
5 |
3 |
5 |
O′A′ |
e |
A.
| B.-
| C.2 | D.-2 |
i |
j |
AB |
i |
j |
AC |
i |
j |
OA |
a |
OB |
b |
OC |
c |
a |
b |
c |
0 |
a |
b |
b |
c |
c |
a |
a |
b |
c |
A.2
| B.2
| C.3
| D.3
|
OA |
OB |
OC |
0 |
A.
| B.
| C.
| D.2
|
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