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