B3311331313231311331322331333132313233313231333131133133313232133312121   >>    B331133131323131133132233133313231323331323133313113313331323213331212   <<    B3311331313231311331322331333132313233313231333131133133313232133312123   >>      B3311331313231311331322331333132313233313231333131133133313232133312122   >>