BD |
a |
AC |
b |
a |
b |
BC |
MN |
1 |
2 |
DC |
1 |
2 |
AC |
1 |
2 |
b |
BC |
BD |
DC |
a |
1 |
2 |
b |
AG |
AE |
2 |
3 |
MN |
BC |
AN |
AC |
AG |
AE |
2 |
3 |
2 |
3 |
MN |
2 |
3 |
BC |
2 |
3 |
a |
1 |
2 |
b |
2 |
3 |
a |
1 |
3 |
b |
AB |
a |
AD |
b |
a |
b |
a |
b |
b |
a |
AC |
a |
DB |
b |
a |
b |
AB |
AB |
AC |
AF |
FC |
AB |
m |
AD |
n |
m |
n |
AF |
BA |
a |
BC |
b |
a |
b |
BD |
BD |
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