a |
a |
b |
a |
c |
b |
c |
a |
b |
a |
c |
b |
c |
a |
a |
b |
c |
a |
b |
c |
a |
b |
c |
a |
a |
a |
a |
b |
a |
c |
a |
b |
a |
c |
a |
b |
a |
c |
a |
b |
c |
b |
c |
b |
c |
a |
b |
a |
c |
a |
b |
a |
c |
a |
b |
a |
c |
a |
b |
c |
a |
b |
c |
b |
c |
b |
c |
a |
b |
c |
a |
b |
c |
a |
b |
c |
a |
b |
c |
a |
b |
b |
c |
a |
b |
c |
c |
a |
b |
c |
a |
OP1 |
OP2 |
OP1 |
OP2 |
AE |
AF |
a |
b |
a |
b |
a |
b |
a |
b |
CE |
CF |
AE |
AF |
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