
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 and \( s \) lines satisfy the following conditions:
1. None of them are horizontal;
2. Any two of them are not parallel;
3. Any three lines among these \( h+s \) lines are not concurrent.
If these \( h+s \) lines exactly divide the plane into 1992 regions, find all positive integer pairs \( (h, s) \).

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