6 4
 2.0 2.0 0.0 0.0
 1.0 1.0 1.0 2.0
 2.0 1.0 0.0 2.0
 3.0 2.0 0.0 0.0
 0.0 0.0 1.0 0.0
 0.0 0.0 2.0 1.0