
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 the "Direct to Moscow" competition of the Chinese National Table Tennis Team, there are 5 female athletes. A total of 6 players are to be selected from these 10 athletes for mixed doubles matches, with Ma Long and Ding Ning being automatically selected. Calculate the number of ways to form the remaining teams.

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