
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
The numbers on each diagonal of a $5\times5$ block of calendar dates are added, where the order of the numbers in the second and the fifth rows are first reversed. Find the positive difference between the two diagonal sums.

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