A = [10.67221819995419 -16.04166063326462   5.40277576664376 -12.25971759661399;
      5.34722021108821  -8.13749698329898   2.75694343887744  -3.65972081442841;
      2.15740660295380  -3.51944323776403   1.19536996814357  -0.31435165073845;
      5.32870169256969  -7.99305253885453   2.66435084628484  -3.73009118479878]

