wyckoffs:
- "f"
- "f"
- "e"
- "e"
- "q"
- "q"
- "q"
- "q"
- "r"
- "q"
- "q"
- "r"
- "q"
- "q"
- "r"
- "r"
- "r"
- "q"
- "q"
- "r"
- "q"
- "q"
- "r"
- "r"