B3311331313231311331322331333132313231333131323223313231333132323213123221   >>    B331133131323131133132233133313231323133313132322331323133313232321312322   <<    B3311331313231311331322331333132313231333131323223313231333132323213123223   >>      B3311331313231311331322331333132313231333131323223313231333132323213123222   >>