D23211331312323132313232213231323113313223313113313232211212331   >>    D2321133131232313231323221323132311331322331311331323221121233   <<    D23211331312323132313232213231323113313223313113313232211212333   >>      D23211331312323132313232213231323113313223313113313232211212332   >>