{{1, -1, 0, 0, 2/3, -1, 1/3, 0, 0, 5/6, -2/3, 0, -1/2, -2/3, 2/3, 0, 0, -1/3, 
  1/2, -1/6, 0, 0, -1/2, 1/2, 0, 1/3}, {0, 0, 1, 1, 0, 0, 0, 2/3, -1/3, 5/6, 
  -1, 1/3, -1/2, 0, 0, -2/3, -2/3, 0, 0, 0, -1/3, 1/6, -1/2, 2/3, -1/6, 1/3}}
