
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
Through a field, there is a straight road. A tourist stands on the road at point \( A \). He can walk on the road at a speed of 6 km/h and on the field at a speed of 3 km/h. Find the set of points to which the tourist can reach in one hour of walking.

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