
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
A store earns a profit of 9 yuan for each pen sold. The cost price of a teddy bear toy is 2 yuan. The store launches a promotional package: "Buy 4 pens and get one teddy bear toy for free." The total profit from this promotion is 1922 yuan. How many pens were sold at most during this promotion?

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