ZEROW

ZERO

ZEROU

A+

A

B+

B

C+

C

0

0

1

1

0

0

1

0

0

0

1

1

1

0

0

0

0

1

0

1

0

0

0

1

0

0

1

1

1

0

0

1

1

0

0

0

1

0

0

0

1

0

0

1

0

1

0

1

0

0

0

1

1

0