
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
Twelve soldiers need to reach a destination 20 km away as quickly as possible. They stopped a small car to help them get there faster.

- I drive at 20 km/h, - said the driver, - but I can only take four at a time. How fast do you walk?
- Each of us walks at 4 km/h, - replied one of the soldiers.
- Great, - exclaimed the driver, - then I'll drive four of you ahead some distance, then return to pick up another four, drive them as well, and come back for the rest. All you need to do is keep walking while you're not in the car. I'll take care of the rest.

The soldiers set off exactly at noon. When will they arrive at the destination?

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