A	B	>NW	>NM	>NN	>WW	>EW	>WM	>EM	>WN	>EN	>SN	>SM	>SW
0	0	1	1	1	1	1	1	1	1	1	1	1	1
0	1	0	0	0	0	0	0	0	0	0	0	0	0
1	0	0	0	0	0	0	0	0	0	0	0	0	0
1	1	1	1	1	1	1	1	1	1	1	1	1	1
