D1212121212131323131133132311233132322331333133313123231323123221   >>    D121212121213132313113313231123313232233133313331312323132312322   <<    D1212121212131323131133132311233132322331333133313123231323123223   >>      D1212121212131323131133132311233132322331333133313123231323123222   >>