
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 the following events:
1. An object will fall freely under the influence of gravity alone;
2. The equation $x^2 + 2x + 8 = 0$ has two real roots;
3. A certain information desk receives more than 10 requests for information consultation during a certain period of the day;
4. It will rain next Saturday.
Among these, the random events are __________. (Fill in all correct serial numbers).

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