|   f1  |       f2  |       f3  |       
  |    
|   1  |       1  |       1  |       {3}  |    
|   1  |       0  |       1  |       {1,2}  |    
|   1  |       1  |       0  |       {1,3}  |    
|   0  |       1  |       1  |       {2,3}  |    
|   0  |       0  |       1  |       {1,2,3}  |    
|   0  |       1  |       0  |       {2}  |    
|   1  |       0  |       0  |       {1,3}  |    
|   0  |       0  |       0  |       {2,3,4}  |    
|   1  |       2  |       0  |       {4}  |    
|   2  |       1  |       0  |       {2}  |    
|   0  |       1  |       2  |       {1,3,4}  |    
|   0  |       2  |       1  |       {2,3,4}  |    
|   1  |       1  |       2  |       {1,3}  |    
|   1  |       2  |       1  |       {2,4}  |    
|   2  |       1  |       1  |       {4}  |    
|   2  |       2  |       0  |       {3,4}  |    
|   0  |       2  |       2  |       {1,2}  |    
|   2  |       0  |       2  |       {2,4}  |    
|   1  |       2  |       2  |       {3,4}  |    
|   2  |       1  |       2  |       {1,3}  |