c

0 2

0

3

1
0 2

0 0 0

1
0 2

0 0 0

1
2 3
1 1 0
1 -1 1

0 0 0

0

3

2 4
0 -1 0 0		# c1 = 0
0 0 -1 0		# c2 = 0

2 4
0 -1 0 1		# c1 = 1
0 0 -1 0		# c2 = 0

2 5
0 -1 0 1 0		# c1 = i
0 0 -1 0 1		# c2 = 1

0