
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
In a sports hall, a table tennis single and double matches are taking place. There are 4 more athletes in the doubles matches than in the singles matches. There are a total of 13 table tennis tables being used in the matches. How many athletes are there in the doubles matches?

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