b2527 b2526 b2525 b2524
b2527 0 3 2.44948974278318 4.47213595499958
b2526 3 0 4 6.92820323027551
b2525 2.44948974278318 4 0 1
b2524 4.47213595499958 6.92820323027551 1 0