X = [
   -0.7783   11.6781
   14.6672    3.8028
   -8.3475   -4.7133
   -6.8840   -5.5677
   13.4167   -3.7199
  -16.0429    2.6031
  -24.1829    0.3222
    8.9161   -9.5737
];
