
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
There are two docks, A and B, on a river. A is upstream, and B is downstream. Person X departs from dock A, and Person Y departs from dock B, both traveling towards each other by rowing. They meet after 4 hours. If Person X and Person Y both depart from A and B simultaneously but travel in the same direction, Person Y catches up to Person X after 16 hours. Given that Person X's rowing speed in still water is 6 kilometers per hour, how many kilometers per hour does Person Y row in still water?

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