
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 trains, one fast and the other slow, are 150m and 200m long respectively. They are moving in opposite directions on parallel tracks. If a person sitting in the slower train observes the faster train passing by the window in 6 seconds, how long does it take for a person sitting in the faster train to see the slower train pass by the window?

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