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