B3311331313231311331322331333132313331323133313233313232213123232311   >>    B331133131323131133132233133313231333132313331323331323221312323231   <<    B3311331313231311331322331333132313331323133313233313232213123232313   >>      B3311331313231311331322331333132313331323133313233313232213123232312   >>