10.0  -1.0   2.0   0.0   6.0
 -1.0  11.0  -1.0   3.0  25.0
  2.0  -1.0  10.0  -1.0 -11.0
  0.0   3.0  -1.0   8.0  15.0
  0.0   0.0   0.0   0.0