B3311331313231311331322331333131211111133132333133311233132323221   >>    B331133131323131133132233133313121111113313233313331123313232322   <<    B3311331313231311331322331333131211111133132333133311233132323223   >>      B3311331313231311331322331333131211111133132333133311233132323222   >>