                                          
      qr                      
                        ttttts
                                                      qr
                                                                
      ts                                      qr
                                                              
      ts                                  qr
                                                            
      ts                                  qr
                                                              
      ts                                      qr
                                                                
      ts                                                
          Զ        qrrrrr                  
          һ                        ts
                                  
                                      
