
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
Tom recalls that the first four digits of his friend's phone number include the digits 9, 8, 7, and 6, but he can't remember the order they were in. How many different combinations are possible for these four digits?

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