B3311331313231311331322331333132313331322331323133313331323221313311221   >>    B331133131323131133132233133313231333132233132313331333132322131331122   <<    B3311331313231311331322331333132313331322331323133313331323221313311223   >>      B3311331313231311331322331333132313331322331323133313331323221313311222   >>