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