• collect_vowels(string) - The parameter s is a string. This function will recursively return a list where the elements in the list are the vowels that exist in s (in the case that appears in s). If there are no vowels in s, then this function will return an empty list.

# Example test assert collectVowels("This Is A Sentence") \ == ['i', 'I', 'A', 'e', 'e', 'e']