{{1, 0, 0, -2, -2, 2, 0, 1, 6, 1, -4, -1, 0, -1, 2}, 
 {0, 1, 0, 1, 1, -1, 0, 0, -5, 0, 2, 0, 1, 0, -1}, 
 {0, 0, 1, 1, 1, -1, 1, 1, -4, -2, 2, 0, 0, 1, -1}}
