
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
Fill in the numbers 1, 2, 3, 4 into the squares labeled 1, 2, 3, 4, with one number per square, such that the label of each square is different from the number filled in it. How many different ways are there to fill in the squares?

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