
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
Arina wrote down all the numbers from 71 to 81 consecutively without spaces, obtaining the large number 717273...81. Sophia then continued appending the next numbers (i.e., first she appended 82, then 83, and so on). She stopped at the moment when the large number became divisible by 12. The last number she appended was $N$. What is the value of $N$?

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