D1212121212131323331312323132322331313232233132322331311112211232313221   >>    D121212121213132333131232313232233131323223313232233131111221123231322   <<    D1212121212131323331312323132322331313232233132322331311112211232313223   >>      D1212121212131323331312323132322331313232233132322331311112211232313222   >>