X = [
    2.0143   10.5575
   17.3465    3.2690
   -8.5257   -7.2959
   -7.9109   -7.6447
   16.3705   -3.8815
  -15.3434    5.0513
  -21.5840   -0.6013
    9.4111   -9.0697
];
