
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
A school is forming a team for a debate competition, selecting 4 members from 6 students to serve as the first, second, third, and fourth debaters. If student A must participate and cannot be the fourth debater, then the number of different possible arrangements is ______ (provide the result numerically).

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