x0 x1 x2 | x0' x1' x2'
- - - --- - - -
0 0 0 | 1 1 0
0 0 1 | 1 1 0
0 1 0 | 0 0 0
0 1 1 | 1 1 1
1 0 0 | 1 1 0
0 0 1 | 1 0 0