D12121212121313233313232313231323123231323223313113313232233132313221111   >>    D1212121212131323331323231323132312323132322331311331323223313231322111   <<    D12121212121313233313232313231323123231323223313113313232233132313221113   >>      D12121212121313233313232313231323123231323223313113313232233132313221112   >>