
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
You are allowed to perform the following operation with the number written on the board: erase two adjacent digits whose sum does not exceed 9, and write their sum in their place. Initially, there was a 200-digit number $3112331123\ldots31123$ written on the board. This operation was repeated on the number until it was no longer possible. What is the largest number that could remain on the board as a result?

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