B3311331313231311331322331333131133133313111333133313331323123132322121   >>    B331133131323131133132233133313113313331311133313331333132312313232212   <<    B3311331313231311331322331333131133133313111333133313331323123132322123   >>      B3311331313231311331322331333131133133313111333133313331323123132322122   >>