33 |
AB |
AE |
AC |
AF |
EF |
BC |
BC |
AC |
AB |
AC |
AB |
AC |
AB |
AC |
AB |
AC |
AB |
AB |
AE |
AC |
AF |
AB |
AB |
BE |
AC |
AB |
BF |
AB |
AB |
BE |
AC |
AB |
AC |
BF |
AB |
BF |
AC |
BF |
BF |
AC |
AB |
1 |
2 |
EF |
BC |
EF |
BC |
EF |
BC |
EF |
BC |
EF |
BC |
EF |
BC |
2 |
3 |
2 |
3 |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
OA |
OC |
OB |
OC |
AC |
BC |
a |
b |
c |
a |
b |
c |
a |
a |
b |
a |
b |
a• |
b |
a |
a |
b |
A.
| B.
| C.
| D.
|
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