
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
From a bag containing 5 red balls and 5 white balls, 3 balls are drawn randomly. Consider the following pairs of events: ① "Drawing two red balls and one white ball" and "Drawing one red ball and two white balls"; ② "Drawing two red balls and one white ball" and "Drawing three red balls"; ③ "Drawing three red balls" and "Drawing three balls with at least one white ball"; ④ "Drawing three red balls" and "Drawing three white balls". Among these, the pairs that are mutually exclusive events are marked with ▲ (fill in the serial number only).

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