D12121212121313233313123231323223313231323331323132333133313233313232212311   >>    D1212121212131323331312323132322331323132333132313233313331323331323221231   <<    D12121212121313233313123231323223313231323331323132333133313233313232212313   >>      D12121212121313233313123231323223313231323331323132333133313233313232212312   >>