︽   ︾ 



    
          
              ︽ ︾  
  
           
          
           
             
            
             
         
                 
          
          
            
            
            
           
              
         
            
          
          
             
            
         
         
    ︽ ︾   
           
           
   ︾        
︾         ︽  
        ︽ 
           
           
          
          
             
         
         
         
               
              20   
    
           
             
           
          
            
              
             
                