
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

Approaching an unfamiliar single-entrance building, and thinking that there are six apartments on each floor, Anna decided that the apartment she needed was on the fourth floor. Upon reaching the fourth floor, Anna discovered that the apartment she needed was indeed there, despite the fact that there are seven apartments on each floor. What could be the number of the apartment Anna was looking for?

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