
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 a $3 \times 3$ grid, numbers $1$ to $9$ are arranged such that if two numbers are consecutive, they must share an edge. The numbers in the four corners add up to $20$. The sum of the numbers along one of the diagonals also equals $15$. Determine the number in the center square.

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