D12121212121313233313123231323223313132322331323132233132333132313331312123311   >>    D1212121212131323331312323132322331313232233132313223313233313231333131212331   <<    D12121212121313233313123231323223313132322331323132233132333132313331312123313   >>      D12121212121313233313123231323223313132322331323132233132333132313331312123312   >>