b0331 b0333 b0334 b0335
b0331 0 1 2 2.82842712474619
b0333 1 0 1.41421356237309 6.92820323027551
b0334 2 1.41421356237309 0 7.74596669241483
b0335 2.82842712474619 6.92820323027551 7.74596669241483 0