
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
Teams A and B each have 7 players who compete according to a predetermined sequence in a Go relay match. Both teams start with their first player competing against each other, the loser gets eliminated, and the winner competes against the second player of the losing team, and so on, until one team's players are all eliminated. The remaining team wins. How many possible match sequences are there?

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