
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 in a go tournament following a predetermined sequence. The first player from each team competes first, with the loser being eliminated. The winner then competes against the next player from the losing team, and this process continues until all players on one team are eliminated. The other team wins, thus forming a potential sequence of the match. What is the total number of possible match sequences?

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