B3311331313231311331322331333131133131113232233132313233313232311   >>    B331133131323131133132233133313113313111323223313231323331323231   <<    B3311331313231311331322331333131133131113232233132313233313232313   >>      B3311331313231311331322331333131133131113232233132313233313232312   >>