
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 football invitational tournament involves 16 cities, with each city sending two teams, Team A and Team B. According to the competition rules, after several days of matches, it is observed that except for Team A from City $A$, the number of matches played by all other teams are different from each other. Find the number of matches played by Team B from City $A$.

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