| S1 | S1→S3 S1→S4S1→S5 S1→S7 S1→S8 |
| S2 | S2→S3 S2→S7 |
| S3 | S3→S4 S3→S5 S3→S7S3→S8 S3→S9 |
| S4 | S4→S5 |
| S5 | S5→S3 S5→S7 S5→S8 |
| S6 | S6→S3 S6→S8 |
| S7 | S7→S8 |
| S8 | S8→S5 |
| S9 | S9→S7 S9→S8 |