
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
In the village of Bol'shie Vasyuki, there is a 50-meter long embankment along the river. A boat, which is 10 meters long, passes by it in 5 seconds when going downstream and in 4 seconds when going upstream. How many seconds will it take for a paper boat to travel from one end of the embankment to the other?

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