D1212121212131323331312323132322331313232233132313223313231323321131231   >>    D121212121213132333131232313232233131323223313231322331323132332113123   <<    D1212121212131323331312323132322331313232233132313223313231323321131233   >>      D1212121212131323331312323132322331313232233132313223313231323321131232   >>