
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
Given that there are 18 leaders standing in two rows, with 11 people in the front row and 10 people in the back row, the Chinese leader in the middle of the front row, and the leaders of the USA and Russia next to the Chinese leader, determine the total number of different standing arrangements.

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