D12121212121313233313123231323223313132322331323132233132313132311   >>    D1212121212131323331312323132322331313232233132313223313231313231   <<    D12121212121313233313123231323223313132322331323132233132313132313   >>      D12121212121313233313123231323223313132322331323132233132313132312   >>