[ [ -1, 0, 0, 0, 0, 0, 0, 0,   0, 0,1 ],
  [ -2, 0, 1, 1, 0,-1, 0, 0,   0, 0,0 ],
  [  1,-1, 0, 0, 0, 0, 0, 0,   0, 0,0 ],
  [  0, 2,-1, 0, 0, 0,-1, 0,   0, 0,0 ],
  [  0, 0,-1, 0, 0, 0, 1, 0,   0, 1,0 ],
  [  0, 0, 1,-1, 0, 0, 0, 0,   0, 0,0 ],
  [  0, 0, 0, 1,-1, 0, 0, 0,   0, 0,0 ],
  [  0, 0, 0, 0, 1, 0, 0, 0,  -1,-1,0 ],
  [  0, 0, 0, 0, 0, 0, 0,-1,1/10, 0,0 ] ]