
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 increasing sequence of positive integers $a_1,$ $a_2,$ $a_3,$ $\dots,$ it's given that
\[a_{n + 2} = a_{n + 1} + a_n\] for all $n \ge 1$. If $a_7 = 210,$ find $a_9$.

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