
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
Driving along a highway, Leila noticed that her odometer showed $12321$ (miles). This number is a palindrome - it reads the same forward and backward. Then $3$ hours later, the odometer displayed the next higher palindrome. What is her average speed, in miles per hour, during this $3$-hour period?

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