b1200 b1199 b1198 b1201
b1200 0 1 1.41421356237309 684.276260000301
b1199 1 0 2 1354.94686242672
b1198 1.41421356237309 2 0 1162.72352689709
b1201 684.276260000301 1354.94686242672 1162.72352689709 0