b2917 b2918 b2919 b2920
b2917 0 3.46410161513775 21.6794833886788 117.84735890125
b2918 3.46410161513775 0 48.9897948556636 19.4935886896179
b2919 21.6794833886788 48.9897948556636 0 4.58257569495584
b2920 117.84735890125 19.4935886896179 4.58257569495584 0