U | U1 | U2 | U3 | U4 | W |
U1 | 1 | 1/2 | 1 | 1/2 | 0.1622 |
U2 | 2 | 1 | 3 | 2 | 0.4226 |
U3 | 1 | 1/3 | 1 | 1/2 | 0.1443 |
U4 | 2 | 1/2 | 2 | 1 | 0.2708 |