{{b[1], b[2], (b[1] - 2*b[2])/3, (b[1] - 2*b[2])/3}, {-b[1], (b[1] + b[2])/9, (b[1] + b[2])/9, (4*b[1] - 5*b[2])/9}, {(-b[1] - b[2])/9, (-b[1] - b[2])/9, (-5*b[1] + 4*b[2])/9, (2*b[1] - 7*b[2])/9}, {-b[2], (5*b[1] - 4*b[2])/9, (5*b[1] - 4*b[2])/9, (5*b[1] - 4*b[2])/9}, {(-5*b[1] + 4*b[2])/9, (-5*b[1] + 4*b[2])/9, (2*(4*b[1] - 5*b[2]))/9, (7*b[1] - 11*b[2])/9}, {(-4*b[1] + 5*b[2])/9, (2*(-4*b[1] + 5*b[2]))/9, (-2*b[1] + b[2])/3, -b[1] + b[2]}, {(-b[1] + 2*b[2])/3, (-b[1] + 2*b[2])/3, (2*b[1] - b[2])/3, b[1]}, {(-2*b[1] + 7*b[2])/9, (-7*b[1] + 11*b[2])/9, b[1] - b[2], -b[1]}}