
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
Sami recalls that her four-digit personal identification number (PIN) includes the digits 1, 3, 5, and 8. She cannot remember the order of these digits. In how many possible ways can these digits be arranged?

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