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