wyckoffs:
- "d"
- "d"
- "d"
- "d"
- "d"
- "d"
- "d"
- "d"
- "d"
- "d"
- "c"
- "d"
- "d"
- "c"
- "c"
- "d"
- "d"
- "d"
- "d"
- "c"