D12121212121313232233132332313231323133313233313113313232211212121   >>    D1212121212131323223313233231323132313331323331311331323221121212   <<    D12121212121313232233132332313231323133313233313113313232211212123   >>      D12121212121313232233132332313231323133313233313113313232211212122   >>