
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 truck is driving at a constant speed on the highway. Initially, the number on the milestone reads AB. After one hour, the number on the milestone reads BA. After another hour, the number on the milestone reads a three-digit number A0B. What is the number on the milestone the third time it is observed?

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