
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
Arrange 5 numbered rooms side by side for 5 workers to rest temporarily. Assuming each person can choose any room and the choice of each room is equally likely, the number of arrangements where exactly 2 rooms are unchosen and these 2 rooms are not adjacent is $\boxed{900}$.

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