B3311331313231311331322331333132313231323331333131133133313231232313223311   >>    B331133131323131133132233133313231323132333133313113313331323123231322331   <<    B3311331313231311331322331333132313231323331333131133133313231232313223313   >>      B3311331313231311331322331333132313231323331333131133133313231232313223312   >>