
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 cookie shop sells $6$ different types of cookies and $4$ different types of milk. Charlie and Delta decide to purchase some items. Charlie will not order more than one of the same type, while Delta will only order cookies, allowing repeats. Determine how many ways they could leave the store with $4$ items collectively. (Example: Charlie buys 1 chocolate chip cookie and 1 soy milk, while Delta buys 2 oatmeal cookies).

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