Number Choosing Contest.

-1

0

1

2

3

-1: breaks WYZ & 1, 3, 4 and 5.
0: breaks WYZ & 2, 3 and 4. It strictly speaking passes 1 and fails 5, but you could contest me on either.
1: breaks YZ & 3, 4 and 5.
2: breaks YZ & 2, 3, 4 and 5.
3: breaks YZ & 2, 3, 4 and 5.

999999

999999: breaks YZ & 1, 2, 4 and 5.