f1 | f2 | f3 |
|
1 | 1 | 1 | {3} |
1 | 0 | 1 | {1,2} |
1 | 1 | 0 | {1,3} |
0 | 1 | 1 | {2,3} |
0 | 0 | 1 | {1,2,3} |
0 | 1 | 0 | {2} |
1 | 1 | 1 | {3} |