
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
A gentleman planned a trip for his employees before the Golden Week, choosing 5 out of 7 tourist cities to visit. If cities M and N must be selected, and the tour must pass through cities M and N in the order of M first and then N (cities M and N can be non-adjacent), then the number of different tour routes is.

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