
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
In the nine cells of a $3 \times 3$ square, the numbers from 1 to 9 are placed. Arseni calculated the sum of the numbers on one diagonal and obtained 6. Alice calculated the sum of the numbers on the other diagonal and obtained 20. What number is in the center of the square?

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