
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
Given a rectangle with perimeter $l$ and area $S$, among the following pairs: (1) (4, 1), (2) (8, 6), (3) (10, 8), and (4) (3, $\frac{1}{2}$), identify the serial numbers of the pairs that could represent the actual values of $(l, S)$.

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