B3311331313231311331322331333131133133313111333133313331323221213121   >>    B331133131323131133132233133313113313331311133313331333132322121312   <<    B3311331313231311331322331333131133133313111333133313331323221213123   >>      B3311331313231311331322331333131133133313111333133313331323221213122   >>