                  (  ) (@@) ( )  (@)  ()    @@    O     @     O     @      O
             (@@@)                                                          
         (    )                                                             
      (@@@@)                                                                
                                                                            
    (   )                                                                   

                  (@@) (  ) (@)  ( )  @@    ()    @     O     @     O      @
             (   )                                                          
         (@@@@)                                                             
      (    )                                                                
                                                                            
    (@@@)                                                                   

