D12121212121313233313123231323223313132322331323132233132313133112121   >>    D1212121212131323331312323132322331313232233132313223313231313311212   <<    D12121212121313233313123231323223313132322331323132233132313133112123   >>      D12121212121313233313123231323223313132322331323132233132313133112122   >>