
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 set out simultaneously from $A$ to $B$ and from $B$ to $A$, respectively. When the first pedestrian has traveled halfway, the second pedestrian has 24 kilometers left to go. When the second pedestrian has traveled halfway, the first pedestrian has 15 kilometers left to go. How many kilometers will the second pedestrian have left to walk after the first pedestrian finishes their journey?

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