mat( ( -2, 2, 0,-1, 0, 0, 0, 0, 0, 0), ( 1,-1, 0, 0, 0, 0, 0, 0, 0, 0), ( 0, 0,-2,-1, 0, 0, 0, 0, 0, 0), ( 0, 0, 1, 0, 0, 0, 0,-1, 0, 1), ( 0, 0, 0, 1, 0, 0,-1, 0, 1, 0), ( 0, 0, 0, 0,-2, 0, 0, 0, 0, 0), ( 0, 0, 0, 0, 1,-1, 0, 0, 0, 0), ( 0, 0, 0, 0, 0, 1, 0, 0, 0, 0), ( 0, 0, 0, 0, 0, 0, 1, 0,-1, 0), ( 0, 0, 0, 0, 0, 0, 0, 1, 0,-1 ) )