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                 
26           
27              
28              
29                 
30        
31        
32            
33            
34               
35                
35            
36            
37           
38             
39           
40              
41         