Web Reference: Kth Distinct String in an Array - A distinct string is a string that is present only once in an array. Given an array of strings arr, and an integer k, return the kth distinct string present in arr. A distinct string is defined as a string that appears exactly once in the array (not duplicated). Your task is to find and return the k th distinct string from the array, considering the strings in the order they appear. A **distinct string** is a string that is present only once in an array. You are given an array of strings `arr`, and an integer `k`, return the `k-th` **distinct string** present in `arr`. If there are **fewer** than `k` distinct strings, return an **empty string** `""`.
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