| Structure |
| Structure |
1a |
| 5a |
|
1b |
| 5b |
|
1c |
| 5c |
|
2a |
| 6a |
|
2b |
| 6b |
|
2c |
| 6c |
|
3a |
| 7a |
|
3b |
| 7b |
|