b2119 b2120 b2121 b2122
b2119 0 8.30662386291808 49.173163412577 51.5751878329105
b2120 8.30662386291808 0 7.41619848709566 124.743737317751
b2121 49.173163412577 7.41619848709566 0 256.255731643216
b2122 51.5751878329105 124.743737317751 256.255731643216 0