B3311331313231311331322331333132313231323331333131133133313232132212121   >>    B331133131323131133132233133313231323132333133313113313331323213221212   <<    B3311331313231311331322331333132313231323331333131133133313232132212123   >>      B3311331313231311331322331333132313231323331333131133133313232132212122   >>