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