| 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| 1 | ∗ | + | + | + | + | + | + |
| 2 | − | ∗ | + | + | + | + | + |
| 3 | − | − | ∗ | + | + | + | + |
| 4 | − | − | − | ∗ | + | + | + |
| 5 | − | − | − | − | ∗ | + | + |
| 6 | − | − | − | − | − | ∗ | + |
| 7 | − | − | − | − | − | − | ∗ |
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