V =
(0:-1)[4:0:0]
(1:-1)[5:6:6]
(2:-1)[6:2:2]
(3:-1)[3:3:3]
(4:-1)[1:7:7]
(5:-1)[7:1:1]
(6:-1)[2:4:4]
(7:-1)[0:5:5]
E =
{1,0} (-1)
{3,0} (-1)
{2,1} (-1)
{4,1} (-1)
{4,3} (-1)
{5,3} (-1)
{6,4} (-1)
{6,5} (-1)
{7,6} (-1)