
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
Class 4A used class funds to purchase three types of stationery, A, B, and C, with unit prices of 3 yuan, 2 yuan, and 1 yuan, respectively. It is known that the number of B items purchased is 2 less than the number of A items purchased, and the cost of purchasing A items does not exceed half of the total cost. If the total cost for purchasing the three types of stationery is exactly 66 yuan, then the maximum number of A items purchased is ______.

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