{{b[1], b[2], b[2], b[3]}, {-b[1], b[2], -b[2] + b[3], 2*b[2]}, {-b[2], -b[2], b[1], 2*b[2] + b[3]}, {-b[2], -b[1], -2*b[2] + b[3], 3*b[2]}, {b[2] - b[3], 2*b[2] - b[3], -1/2*b[1] + b[2]/2 + b[3]/2, -1/2*b[1] + b[2]/2 + b[3]/2}, {-2*b[2], -3*b[2], -1/2*b[1] - b[2]/2 + b[3]/2, -1/2*b[1] - b[2]/2 + b[3]/2}, {-2*b[2] - b[3], b[1]/2 + b[2]/2 - b[3]/2, b[1]/2 + b[2]/2 - b[3]/2, -3*b[2] + b[3]}, {-b[3], b[1]/2 - b[2]/2 - b[3]/2, b[1]/2 - b[2]/2 - b[3]/2, 3*b[2] - b[3]}}