Pronunciation [2]

     1     2      3              
  4                     5     
                6         7   
   8                       
  9        10                  
                        
11                  12          
                  13        
          14                
                        
15                16            
                        
                        
17           18                 
                        
         19    20               
    21                      
22    23                        
                        
          24       25           
                        
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           27