a
	[  ------  ]
	[ /	 / ]
	[ /f	b/ ]
	[ \	 / ]
	[  \    /  ]
       g[   ~  ~   ]h
	[   ~  ~   ]
	[  /    \  ]
	[ /	 \ ]
	[ /e	c/ ]
	[ /	 / ]
	[  ------  ]
	      d

1	Common
2	A
3	G
4	F
5	E
6	NC
7	D
8	C
9	H
10	B