
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 tens digit of a three-digit number is less than both the hundreds and the units digits, then such a three-digit number is called a "reentrant number" (e.g., 201, 636, 734, etc.). How many reentrant numbers are there in total?

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