D3311222132313331313132313223313232233132313331323133313232212121   >>    D331122213231333131313231322331323223313231333132313331323221212   <<    D3311222132313331313132313223313232233132313331323133313232212123   >>      D3311222132313331313132313223313232233132313331323133313232212122   >>