
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
Among the following sets of numbers: ①$1$,$2$,$3$; ②$2$,$3$,$4$; ③$3$,$4$,$5$; ④$3$,$6$,$9$, the ones that can be the side lengths of a triangle are ______$(Fill in all the numbers that meet the requirements)$.

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