/**
 * Damerau–Levenshtein distance
 * [Damerau–Levenshtein distance - Wikipedia](https://en.wikipedia.org/wiki/Damerau%E2%80%93Levenshtein_distance)
 * @param a - first word
 * @param b - second word
 * @returns Distance value
 */
export declare function levenshteinDistance(a: string, b: string): number;
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