B3311331313231311331322331333132313231333133313311231211233132313232223323221   >>    B331133131323131133132233133313231323133313331331123121123313231323222332322   <<    B3311331313231311331322331333132313231333133313311231211233132313232223323223   >>      B3311331313231311331322331333132313231333133313311231211233132313232223323222   >>