Write vowel_words(words) that keeps non-empty words whose first letter is a vowel (a, e, i, o, u — any case).
vowel_words(['apple', 'Banana', 'Orange']) → ['apple', 'Orange']
vowel_words([]) → []
Submit runs 4 tests, including hidden edge cases.
Each hint gives a little more help. Try on your own first.
Run your code to see the output here.