
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
For three lines in space, there are the following four conditions:

① The three lines intersect pairwise but do not share a common point; ② The three lines are pairwise parallel; ③ The three lines share a common point; ④ Two of the lines are parallel, and the third line intersects both of these lines. Among these, the sufficient conditions for the three lines to be coplanar are        .

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