public class Solution {
    public int countVowels(String text) {
        String[] vowels = { "a", "e", "i", "o", "u" };
        String[] words = text.split("");
        int count = 0;

        for (int index = 0; index < words.length; index++) {
            String currentLetter = words[index];
            
            for (String letter : vowels) {
                if ( currentLetter.toLowerCase().equals(letter) ) {
                    count++;
                }

            }
        }

        return count;
    }
}