Limite remarcabile :

                                       

                                                                   daca               

                                       

                                                                      daca         

                                                                   si            daca               

                                                                      si              daca               

                                                                 si                daca               

                                                    daca  

                                             

                                                              si                        daca            

                                                                                    

   daca                        

                              daca   

                     si         daca