
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
Xiao Ming took $20$ yuan to the supermarket to buy pens and exercise books. Each pen costs $3$ yuan, and each exercise book costs $2$ yuan. If he wants to buy both items and spend all $20$ yuan, calculate the number of different purchasing plans.

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