
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
There are \( h + s \) lines on a plane, where \( h \) lines are horizontal. The \( s \) lines satisfy:
1. None of them are horizontal;
2. Any two of them are not parallel;
3. No three lines among the \( h + s \) lines are concurrent, and the \( h + s \) lines exactly divide the plane into 1992 regions.
Find all pairs of positive integers \( (h, s) \).

Present the answer in LaTex format: \boxed{Your answer}
user