cz
2
1
0 1
(1.0,0.0) (0.0,0.0) (0.0,0.0) (0.0,0.0)
(0.0,0.0) (1.0,0.0) (0.0,0.0) (0.0,0.0)
(0.0,0.0) (0.0,0.0) (1.0,0.0) (0.0,0.0)
(0.0,0.0) (0.0,0.0) (0.0,0.0) (-1.0,0.0)