Determine which of the given pairs of numbers (s, t) will result in the program outputting "YES". Then, write the numbers of these pairs in ascending order.

Analysis of the condition:

The program outputs "YES" if the condition s > 0 && t > 3 is true. Let's check each pair:

1. (2, 6): s = 2, t = 6. 2 > 0 is true, and 6 > 3 is true. Both conditions are met.
2. (6, 3): s = 6, t = 3. 6 > 0 is true, but 3 > 3 is false. The condition is not met.
3. (-1, 1): s = -1, t = 1. -1 > 0 is false. The condition is not met.
4. (-8, 2): s = -8, t = 2. -8 > 0 is false. The condition is not met.
5. (13, 4): s = 13, t = 4. 13 > 0 is true, and 4 > 3 is true. Both conditions are met.

Conclusion:

The pairs that satisfy the condition are (2, 6) and (13, 4). The numbers of these pairs are 1 and 5.

Answer: 1, 5