D1212121212131323331312323132322331313232233132313223313331333131321   >>    D121212121213132333131232313232233131323223313231322331333133313132   <<    D1212121212131323331312323132322331313232233132313223313331333131323   >>      D1212121212131323331312323132322331313232233132313223313331333131322   >>