
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
The school plans to hold special lectures for Chinese, Mathematics, English, and Science Comprehensive during the first, second, and third classes of Friday afternoon. Each subject occupies one class period, and there must be at least one subject per period. Additionally, Mathematics and Science Comprehensive cannot be arranged in the same period. Determine the total number of different arrangements of the lectures.

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