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function mergeAlternately(word1: string, word2: string): string {    return Array(2 * Math.max(word1.length, word2.length))        .fill(0)        .map((_, i) =>            i % 2 ? word2[Math.floor(i / 2)] : word1[Math.floor(i / 2)]        )        .join("");}export default mergeAlternately;