
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
Given that Professor Lee has ten different language books lined up on a bookshelf: three German, four Spanish, and three French, find the number of ways to arrange the ten books on the shelf keeping both the Spanish and French books together as separate units.

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