D12121212121313233313123231323223313132322331323132233132312123231   >>    D1212121212131323331312323132322331313232233132313223313231212323   <<    D12121212121313233313123231323223313132322331323132233132312123233   >>      D12121212121313233313123231323223313132322331323132233132312123232   >>