D1212132333131333131231323132322331323221123313231323123121123311   >>    D121213233313133313123132313232233132322112331323132312312112331   <<    D1212132333131333131231323132322331323221123313231323123121123313   >>      D1212132333131333131231323132322331323221123313231323123121123312   >>