v  0   1   0
v -1   0   0
v  1   0   0
v  0  -1   0
v  0   0  -1
v  0   0   1
l 6 1
l 6 2
l 6 3
l 6 4
l 1 2
l 1 3
l 2 4
l 3 4
l 1 5
l 2 5
l 3 5
l 4 5
