
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
Mrs. Collector has five different Batman comic books, three different Superman comic books, six different X-Men comic books, and four different Iron Man comic books. When stacked, all Batman comics are grouped together, all Superman comics are grouped together, all X-Men comics are grouped together, and all Iron Man comics are grouped together. In how many different orders can these 18 comic books be stacked in a pile with the covers facing up and all of them facing the same direction?

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