
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 metro system of city $\mathrm{N}$ consists of three lines, and its schema is shown in the diagram. Initially, trains are located at designated stations and start moving in the directions indicated by the arrows. Each minute, each train travels exactly one segment between stations. Upon reaching a terminal station, the train instantly reverses direction and begins moving back the other way. At which stations will the trains be located after 2016 minutes?

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