
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
A 9x9 grid of squares is labeled with whole numbers from 1 through 81, each square containing one number. The numbers are assigned from left to right and then from top to bottom, starting with 1 at the top left and ending with 81 at the bottom right. Compute the sum of the numbers at the four corners of the grid.
A) 160
B) 162
C) 164
D) 166
E) 168

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