D12121212121313233313232313231323123231323223313113313232331231   >>    D1212121212131323331323231323132312323132322331311331323233123   <<    D12121212121313233313232313231323123231323223313113313232331233   >>      D12121212121313233313232313231323123231323223313113313232331232   >>