
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
Linette has 15 boxes. Nine of the boxes contain markers, five contain stickers, and four contain both markers and stickers. How many boxes contain neither markers nor stickers?

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