
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
John recalls that the digits in his phone extension consist of 5, 7, 8, 9, and 0, but cannot remember their order. How many different orderings are possible for his phone extension?

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