D12121212121313233313123231323223313231323331323132333133313233313231232322221   >>    D1212121212131323331312323132322331323132333132313233313331323331323123232222   <<    D12121212121313233313123231323223313231323331323132333133313233313231232322223   >>      D12121212121313233313123231323223313231323331323132333133313233313231232322222   >>