
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
Bill is dispatched to a bakery to purchase exactly ten donuts. The bakery offers five kinds of donuts, and Bill must purchase at least one of each variety. How many different combinations of donuts can Bill acquire to fulfill these criteria?

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