solutions B — extend both ends
| B-1: | 5 ~ | 6 ~ | 7 ~ | 8 (mod = | 9) | M9-S1-A0 |
| B-2: | 5 ~ | 6 ~ | 7 ~ | 0 (mod = | 8) | M8-S1-A0 |
| B-3: | 8 ~ | 0 ~ | 1 ~ | 2 (mod = | 9) | M9-S1-A0 |
| B-4: | 7 ~ | 0 ~ | 1 ~ | 2 (mod = | 8) | M8-S1-A0 |
| B-5: | 0 ~ | 4 ~ | 1 ~ | 5 (mod = | 7) | M7-S3-A0 |
| B-6: | 14 ~ | 12 ~ | 10 ~ | 8 (mod = | 15) | M15-S2-A0 |
| B-7: | 13 ~ | 9 ~ | 5 ~ | 1 (mod = | 14) | M14-S4-A1 |
| B-8: | 3 ~ | 3 ~ | 3 ~ | 3 (mod = | 12) | M12-S0-A3 |
| B-9: | 10 ~ | 4 ~ | 9 ~ | 3 (mod = | 11) | M11-S5-A0 |
| B-10: | 2 ~ | 7 ~ | 2 ~ | 7 (mod = | 10) | M10-S5-A2 |