D12121212121313233313123231323223313132322331323132233132313113312111   >>    D1212121212131323331312323132322331313232233132313223313231311331211   <<    D12121212121313233313123231323223313132322331323132233132313113312113   >>      D12121212121313233313123231323223313132322331323132233132313113312112   >>