A - Appearance Count

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You will be given **m** strings. For each of those strings, you need to count the total number of appearances of that string as substrings in all possible strings of length **n** containing only lowercase English letters. A string may appear in a string multiple times. Also, these appearances may overlap. All these must be counted separately. For example, *aa* appears thrice in the string *aaacaa

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solution.cppC++17

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