
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 16-slice pizza is made with only pepperoni and mushroom toppings, and every slice has at least one topping. Only nine slices have pepperoni, and exactly twelve slices have mushrooms. How many slices have only mushrooms?

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