
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 school has eight identical copies of a specific textbook. During the school day, some of these textbooks can be in the classroom, and others in the library. How many different ways are there for some of the books to be in the classroom and the rest in the library if at least one book must be in both locations?

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