Kab Constant Calculator
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Usage: kab <4-digit-number>

Run Kaprekar's constant calculation process.
Takes a 4-digit number and repeatedly rearranges digits
in ascending/descending order, subtracts smaller from larger,
until reaching 6174 (Kaprekar's constant).

The input number should have at least 2 different digits.

Example: kab 1234

Report issues to Github repository