{{1, -1, 0, 0, 0, 0, 0, 1, 0, 1, -2, 1, 0, -3, -1/2, 1/2, 0, 1/2, 1/2, -1/2, 
  0, -1/2, 1, -1/2, 0, 1/2}, {0, 0, 1, 1, 1/3, -1/3, 1/3, 0, 1, 0, 0, 0, -2, 
  -3, 1/6, -1/6, -2/3, 1/2, -1/6, 1/6, -2/3, 1/6, -1/3, 1/6, 4/3, 1/2}}
