{{b[1], b[2], b[2], b[1]/3 + (2*b[2])/3}, {-b[1], -1/6*b[1] + b[2]/6, b[1]/6 + (5*b[2])/6, b[1]/3 + (5*b[2])/3}, {-b[2], -b[2], b[1]/3 + (5*b[2])/3, b[1] + b[2]}, {-1/3*b[1] - (2*b[2])/3, b[1]/6 - b[2]/6, (5*b[1])/6 + b[2]/6, 2*b[2]}, {-1/6*b[1] - (5*b[2])/6, (-5*b[1])/6 - b[2]/6, b[1]/6 + (5*b[2])/6, -1/6*b[1] + (7*b[2])/6}, {-1/3*b[1] - (5*b[2])/3, -2*b[2], b[1]/2 + b[2]/2, b[1]/2 + b[2]/2}, {-1/2*b[1] - b[2]/2, -1/2*b[1] - b[2]/2, b[1]/2 - (3*b[2])/2, b[1]/6 - (7*b[2])/6}, {-1/3*b[1] - (5*b[2])/3, -1/6*b[1] - (5*b[2])/6, -1/2*b[1] + (3*b[2])/2, -1/3*b[1] + b[2]/3}, {-b[1] - b[2], b[1]/6 - (7*b[2])/6, -1/6*b[1] + (7*b[2])/6, b[1]/3 - b[2]/3}}