Himanshu, Vipin and Crush

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Himanshu and Vipin both are having crush on a girl X. Now X is very confused about which one to choose.As X is a programming student, she came up with a programming problem and asked Himanshu and Vipin to solve it. Now you need to help them. You are given a array of strings and an integer K.You need to find a string of length K(this string will be substring for one or more strings) such that it i

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solution.cppC++17

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