
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 passenger trains, A and B, are 150 meters and 200 meters long, respectively. They are moving towards each other on parallel tracks. A passenger on train A measures that it takes 10 seconds for train B to pass by his window. How long does it take for a passenger on train B to see train A pass by his window in seconds?

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