| x1x2x3 | f1 | f2 | f3 |
| 000 | 0 | 0 | 0 |
| 001 | 1 | 1 | 0 |
| 010 | 1 | 1 | 0 |
| 011 | 1 | 0 | 1 |
| 100 | 0 | 1 | 0 |
| 101 | 1 | 1 | 1 |
| 110 | 1 | 0 | 1 |
| 111 | 1 | 1 | 1 |
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