B3311331313231311331322331333132313233313233231333133313232112323221231   >>    B331133131323131133132233133313231323331323323133313331323211232322123   <<    B3311331313231311331322331333132313233313233231333133313232112323221233   >>      B3311331313231311331322331333132313233313233231333133313232112323221232   >>