b1040 b1039 b1038 b1037
b1040 0 1 1.41421356237309 3
b1039 1 0 2.44948974278318 1.41421356237309
b1038 1.41421356237309 2.44948974278318 0 2.44948974278318
b1037 3 1.41421356237309 2.44948974278318 0