The program prints "YES" if the condition `(s > 2) and (t < 9)` is true. Let's check each pair:
1) (6,7): 6 > 2 and 7 < 9 is true. Output: YES.
2) (-3,-2): -3 > 2 is false. Output: NO.
3) (4,4): 4 > 2 and 4 < 9 is true. Output: YES.
4) (-4,-4): -4 > 2 is false. Output: NO.
5) (4,-4): 4 > 2 is true, but -4 < 9 is true. Output: YES.
The pairs that result in "YES" are (6,7), (4,4), and (4,-4). These correspond to options 1, 3, and 5. The answer should be the numbers of these options in ascending order.
1, 3, 5