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