
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
The mathematician John is trying to remember his girlfriend Alicia's 7-digit phone number. He remembers the following:

1. The first four digits consist of one 1, one 2, and two 3s.
2. The fifth digit is either a 4 or a 5.
3. The seventh digit is 9 minus the sixth digit.

How many phone numbers does John have to try to ensure he dials the correct number?

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