D1212121212131323331312323132322331313232233132313223313331323132331231   >>    D121212121213132333131232313232233131323223313231322331333132313233123   <<    D1212121212131323331312323132322331313232233132313223313331323132331233   >>      D1212121212131323331312323132322331313232233132313223313331323132331232   >>