1               
                  3  
       4      3 4     
          3 4        
       5       4  
    5       4    
           4        
      4        
         
        2 .              2
         3     3    
       3       4   
      4       4  
         5     4  
            4  
           3   
            
        3 .          
             2    
     3       3     
      4       4  
         3 5      
      5        
     5        5  
             
        4 .             
     2     2       3
           4       
              
             
        5 .            
     2     2       
     3     4        
              
             