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Problem Statement You are given a string �S consisting of lowercase English letters. The length of �S is between 33 and 100100, inclusive. All characters but one of �S are the same. Find �x such that the �x-th character of �S differs from all other characters. Constraints �S is a string of length between 33 and 100100, inclusive, consisting of two different lowercase English letters. All characters but one of �S are the same.