[ [ -1, 0, 0, 0, 1,0, 0, 0,0, 0 ],
  [  1,-1, 1, 1,-1,0, 0, 0,0, 0 ],
  [  0, 0, 0, 0, 0,1,-1,-1,0, 0 ],
  [  0, 1,-1,-1, 0,0, 0, 0,0, 0 ],
  [  0, 0, 0, 0, 0,0, 0, 0,1,-1 ] ]