{{1, 0, 0, 0, 2/3, -1/3, 0, 0, 5/6, 0, -7/6, -5/6, 1/6}, 
 {0, 1, 0, 0, 1/3, -2/3, 0, 0, 1/6, 0, -5/6, -1/6, -1/6}, 
 {0, 0, 1, 0, -1/3, -1/3, 0, 0, -1/6, 0, -1/6, 1/6, 1/6}, 
 {0, 0, 0, 1, -2/3, -2/3, 2, 1, 2/3, 1, -4/3, 1/3, 1/3}}
