
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
A number written on the board undergoes the following operation: erase two adjacent digits whose sum does not exceed 9, and write their sum in their place. Initially, a 200-digit number $12341234 \ldots 1234$ was written. This operation was performed on the number on the board until it became impossible to continue. What is the largest possible number that could result on the board?

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