
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
Given a $3 \times 3$ matrix of consecutive calendar dates starting from 8 arranged row-wise, first add 3 to each number in the first row, then reverse the order of the numbers in the modified first row, and finally sum the numbers on each diagonal, calculate the positive difference between the two diagonal sums.

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