
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 four statements: ① $\sqrt{a^2}=a$; ② every real number has a cube root; ③ the sum of irrational numbers is always irrational; ④ all real numbers correspond one-to-one with points on the number line. The correct ones are______.

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