> Julia has a string, s, consisting of one or more of the following letters: a, e, i, o, and u.
We define a magical subsequence of s to be a sequence of letters derived from s that contains all five vowels in order. This means a magical subsequence will have one or more a's followed by one or more e's followed by one or more i's followed by one or more o's followed by one or more u's. For example, if s = "aeeiooua", then "aeiou" and "aeeioou" are magical subsequences but "aeio" and "aeeioua" are not.