A B C   Y
2 1 1  17.5  
1 2 2   9.0   
2 1 2  19.5 
1 2 1   7.0   
2 1 2  19.0  
1 1 1   8.0  
1 2 1   8.0   
2 2 1  17.0
1 1 2   7.5  
1 1 1   7.5  
1 2 2   7.5   
1 1 2   8.0   
2 2 2  16.0  
2 2 1  16.0  
2 2 2  16.0  
2 1 1  18.0