| b | c | d | e |
1 | 0 | 0 | 1 | 1 |
2 | 1 | 0 | 0 | 0 |
3 | 1 | 1 | 0 | 0 |
4 | 0 | 0 | 0 | 1 |
5 | 0 | 1 | 1 | 0 |