
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
Use 40 yuan to buy exercise books priced at 2 yuan, 5 yuan, and 11 yuan each. Buy at least one of each kind, and spend exactly 40 yuan. How many different ways are there to purchase the exercise books?

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