D12121212121313233313123231323223313132322331323132233133313231323233121   >>    D1212121212131323331312323132322331313232233132313223313331323132323312   <<    D12121212121313233313123231323223313132322331323132233133313231323233123   >>      D12121212121313233313123231323223313132322331323132233133313231323233122   >>