D23211331312323132313232213231323113313223313113313132322331123231   >>    D2321133131232313231323221323132311331322331311331313232233112323   <<    D23211331312323132313232213231323113313223313113313132322331123233   >>      D23211331312323132313232213231323113313223313113313132322331123232   >>