wyckoffs: - "b" - "c" - "b" - "c" - "b" - "c" - "c" - "c" - "c" - "b" - "c" - "b" - "c" - "b" - "c" - "c" - "c" - "c" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "e" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f" - "f"