
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 that the Chinese class must be placed in the first four periods and the Biology class in the last two periods, determine the number of possible arrangements for the remaining classes—Mathematics, Physics, English, and Chemistry.

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