D12121212121313233313232313231323123231323223313113313232233132313221221   >>    D1212121212131323331323231323132312323132322331311331323223313231322122   <<    D12121212121313233313232313231323123231323223313113313232233132313221223   >>      D12121212121313233313232313231323123231323223313113313232233132313221222   >>