
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
The ship "Wuyang" sails downstream for 135 kilometers and then upstream for 70 kilometers, taking a total of 12.5 hours. If the ship sails downstream for 75 kilometers and then upstream for 110 kilometers, it also takes 12.5 hours. What is the speed of the water flow in kilometers per hour?

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