The condition for printing "YES" is `s > 2` and `t < 9`. Let's check each pair:
1) (6, 7): 6 > 2 and 7 < 9. Both are true. YES.
2) (-3, -2): -3 > 2 is false. NO.
3) (4, 4): 4 > 2 and 4 < 9. Both are true. YES.
4) (-4, -4): -4 > 2 is false. NO.
5) (4, -4): 4 > 2 and -4 < 9. Both are true. YES.
The pairs that result in "YES" are 1, 3, and 5.