D1212121212131323331312323132322331313232233132313223313331323113211   >>    D121212121213132333131232313232233131323223313231322331333132311321   <<    D1212121212131323331312323132322331313232233132313223313331323113213   >>      D1212121212131323331312323132322331313232233132313223313331323113212   >>