B3311331313231311331322331333132313231333133313311231211233132323221   >>    B331133131323131133132233133313231323133313331331123121123313232322   <<    B3311331313231311331322331333132313231333133313311231211233132323223   >>      B3311331313231311331322331333132313231333133313311231211233132323222   >>