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