Minimum of vowels

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You are given a string $S$ of length $N$. Among all the vowels in $S$, you need to find the minimum one, i.e. the one which comes first in the English alphabet. ###Input - The first line of the input contains a single integer $T$ denoting the number of test cases. The description of $T$ test cases follows. - The first line of each test case contains a single integer $N$ denoting the length of $S$

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solution.cppC++17

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