B3311331313231311331322331333132313231333131323223313223313333311   >>    B331133131323131133132233133313231323133313132322331322331333331   <<    B3311331313231311331322331333132313231333131323223313223313333313   >>      B3311331313231311331322331333132313231333131323223313223313333312   >>