|   A  |       U1  |       U2  |       U3  |       U4  |       U5  |       W  |    
|   U1  |       1  |       1/2  |       2  |       6  |       3  |       0.265  |    
|   U2  |       2  |       1  |       3  |       7  |       4  |       0.418  |    
|   U3  |       1/2  |       1/3  |       1  |       5  |       2  |       0.167  |    
|   U4  |       1/6  |       1/7  |       1/5  |       1  |       1/4  |       0.041  |    
|   U5  |       1/3  |       1/4  |       1/2  |       4  |       1  |       0.108  |