
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
During the winter vacation, five students took a high-speed train for a trip. They purchased tickets with real-name registration, each with an assigned seat, all in the same row consisting of seats A, B, C, D, and E (a row of five seats). After boarding the train, they randomly sat in these five seats. The number of seating arrangements such that exactly one student ends up in their own ticket's assigned seat is ____.

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