X = [
    3.8760    9.8104
   19.1326    2.9130
   -8.6445   -9.0177
   -8.5955   -9.0294
   18.3397   -3.9892
  -14.8771    6.6834
  -19.8514   -1.2169
    9.7412   -8.7337
];
