
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
Kolya Vasin walked for five hours after school. First, he walked on a horizontal road, then climbed a hill, and finally returned to the starting point along the same route. His speed was 4 km/h on the horizontal section, 3 km/h when climbing the hill, and 6 km/h when descending the hill. What distance did Kolya Vasin cover?

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