
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 $3\times 3$ block of calendar dates is shown. First, the order of the numbers in the first and the third rows are reversed. Then, the numbers on each diagonal are added. What will be the positive difference between the two diagonal sums?

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