
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
Two pedestrians simultaneously departed from point A to point B and from point B to point A. When the first pedestrian had covered half the distance, the second pedestrian had 24 kilometers remaining. When the second pedestrian had covered half the distance, the first pedestrian had 15 kilometers remaining. How many kilometers will the second pedestrian have left to walk when the first pedestrian finishes their journey?

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