
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
If the number written on the board is divisible by 19, it is divided by 19; if not, 17 is added to it. After this, the new number is written in place of the old one. Initially, a natural number less than 17 was written on the board. What is the largest possible number that could be obtained after several allowed operations?

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