┌─────┐ ┌───┐ │ W │ │ W│ │ | │ │ |│ │W-W-W│ │W-W│ └─┐|┌─┘ └┐ |│ \|X|│|│|X|X│ |│|X|/ -i-i┘|└O-O-┘ |└O-O- \|┌─┘| | | | | | | |└─┐|X|/ -i---W W-W-W W---W-W W---O-O- ┌| | | | | | | | | |┐ │| W | | W | | W-W-W | |│ \|┘| | | | | | | | | |│ -6-W W-W-W W-W-W | | W | |│ /| | | | | | | | | | |└|/ | W-W W-W-W | | | W-W-W-O- \| | | | | | | | │\ ┌───┐ -6-W-W-W | W-W---W W-W-W | └──┘W │ ┌| | | | | | | | │ │| | W | W-W-W W---W-W W-W-W W-----W-W│ \|┘| | | | | | | | | | ┌──┐| │ -6-W-W W-W-W W-W-W W | | | W-O- │W │ /| | | | | | | | | | |/|\ │| │ | W-W-W W-W | W---W-W W-O- │W │ \| | | | | | |┌|\ └───┘ -T-W-W-W-W | W-W-W | |│ ┌───┐ /|┐| | | | | | |┘ │ W│ │| | | W-W-W W-W---W-O---O- │ |│ └| | | | | | | | |└┐ │W-W│ -O-O---W-W W | | W | | | └─┐└─┐|│ /|┐| | | | | | | | | └┐|│|│|/ │| | W-W-W W---W-W W-W-----O┘|└O- │| | | | | | | | | |\|/ │| W-W W-W W-W W-W-W-O- └| | | | | | | -O---W W-W-W W-W-W W---W---W | W | | X| | | | | | | | | | | | |/ -O---W-W---S-S---S-W W W-W---W W-W-O- /|└─┐| |┌─┘|/| |┐| | | | | |\ -S-S- │| W-W-W | W-W-W | | | └| | | | |/ -S┐ W┌S---W-W-W-O- |└─────┘|└─┐| | |\ -S---W-O- | |\ |