| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | selection | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +----------------+--------------------------------------------------------------+
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | selection | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +----------------+--------------------------------------------------------------+
| | | | | | selection | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +----------------+--------------------------------------------------------------+
| | | selection | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +----------------+--------------------------------------------------------------+