D1212121212131323331312323132322331323132333132313233313331323331333111   >>    D121212121213132333131232313232233132313233313231323331333132333133311   <<    D1212121212131323331312323132322331323132333132313233313331323331333113   >>      D1212121212131323331312323132322331323132333132313233313331323331333112   >>