| 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 (bottom) |
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 (bottom) |
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 (bottom) |
N1 |