We want to know the index of the vowels in a given word, for example, there are two vowels in the word super (the second and fourth letters). 
So given a string "super", we should return a list of [2, 4].
        Some examples:
        Mmmm  => []
        Super => [2,4]
        Apple => [1,5]
        YoMama -> [1,2,4,6]
**NOTES:**
* Vowels in this context refers to: a e i o u y (including upper case)
* This is indexed from `[1..n]` (not zero indexed!)
def vowel_indices(word):
    return [i for i,x in enumerate(word,1) if x.lower() in 'aeiouy']
def vowel_indices(word):
    return [i for i,x in enumerate(word,1) if x.lower() in 'aeiouy']