
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
Suppose that under the new Gaokao scheme, students A and B each select two subjects to study from the four subjects of politics, history, physics, and chemistry. Calculate the probability that their chosen subjects are different.

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