
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
There is a type of four-digit number where the sum of any two adjacent digits is no greater than 2. When these numbers are arranged in ascending order, what is the second to last number?

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