Control-NOT

A B C

0 0 0

0 1 1

1 0 1

1 1 0

Contr-Contr-NOT (Tuffoli)

A B C D

0 0 0 0

0 0 1 1

0 1 0 0

0 1 1 1

1 0 0 0

1 0 1 1

1 1 0 1

1 1 1 0