D12121212121313233313232313231323123231323223313113313232233132313232111211   >>    D1212121212131323331323231323132312323132322331311331323223313231323211121   <<    D12121212121313233313232313231323123231323223313113313232233132313232111213   >>      D12121212121313233313232313231323123231323223313113313232233132313232111212   >>