b1224 b1225 b1226 b1227
b1224 0 1 3 4.24264068711928
b1225 1 0 2 3.16227766016838
b1226 3 2 0 2.44948974278318
b1227 4.24264068711928 3.16227766016838 2.44948974278318 0