
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
Jia goes up Mount Wu for morning exercise, while Yi descends along the same route. They start at the same time, and after meeting, Jia continues to ascend for 16 minutes, and Yi continues to descend for 9 minutes before each reaches the other's starting point. The ratio of Jia's ascending speed to Yi's descending speed is     .

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