R|C

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

G

1

OPBF

1

0

1

0

0

1

1

1

0

1

0

1

0

1

0

0

2

COPBF

1

0

1

0

0

0

1

0

0

1

0

1

1

1

1

0

3

DIFF

0

0

0

0

0

1

0

1

0

0

0

0

1

0

1

0