Make Number of Distinct Characters Equal: coding question

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Determine whether a single swap of one character from each of two lowercase strings can make their counts of distinct characters equal. The core challenge is to reason about how swapping a letter can introduce or remove unique letters from each string (over a fixed 26-letter alphabet) so the distinct-character totals match.

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Leetcode 2531. Make Number of Distinct Characters Equal
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Make Number of Distinct Characters Equal

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Make Number of Distinct Characters Equal

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