
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
In the 2017 Shanghai college entrance examination reform plan, it is required that each candidate must choose 3 subjects from 6 subjects including Physics, Chemistry, Biology, Politics, History, and Geography to take the level examination. Xiaoming decided to choose at most one subject from Biology, Politics, and History. There are several possible subject combinations for Xiaoming.

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