
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 cells of a $3 \times 3$ square are placed the numbers $0, 1, 2, \ldots, 8$. It is known that any two consecutive numbers are placed in adjacent (side-by-side) cells. What number can be in the central cell if the sum of the numbers in the corner cells is $18?$

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