
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
First, arrange the natural numbers starting from 1 in a sequence:
\[ 123456789101112131415 \cdots \]
Then group them according to a certain pattern:
\[ 1, 23, 456, 7891, 01112, 131415, \cdots \]
Among the grouped numbers, there is a number with a tens place. What is this tens place digit?

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