| Level 6 (top) |
N6A |
N6B |
N6C |
|---|---|---|---|
| Level 5 |
N5A |
N5B | |
| Level 4 |
N4A |
N4B |
N4C |
| Level 3 |
N3A |
N3B | |
| Level 2 |
N2A |
N2B | |
| Level 1 |
N1 |
| Level 6 (top) |
N6A |
N6B |
N6C |
|---|---|---|---|
| Level 5 |
N5A |
N5B | |
| Level 4 |
N4A |
N4B |
N4C |
| Level 3 |
N3A |
N3B | |
| Level 2 |
N2A |
N2B | |
| Level 1 |
N1 |
| Level 6 (top) |
N6A |
N6B |
N6C |
|---|---|---|---|
| Level 5 |
N5A |
N5B | |
| Level 4 |
N4A |
N4B |
N4C |
| Level 3 |
N3A |
N3B | |
| Level 2 |
N2A |
N2B | |
| Level 1 |
N1 |