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