b4200 b4201 b4202 b4203
b4200 0 1 2.44948974278318 7.48331477354788
b4201 1 0 1.41421356237309 9.48683298050514
b4202 2.44948974278318 1.41421356237309 0 1.41421356237309
b4203 7.48331477354788 9.48683298050514 1.41421356237309 0