
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
Nine children, constituting three sets of three siblings, will occupy a van for a trip. The van has three rows, each containing three seats. Siblings should not sit next to each other in the same row, and no child may sit directly in front of or directly behind a sibling. Calculate the total number of possible seating arrangements given these restrictions.

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