/**
* Returns {@code true} if the first letter in the given word is a vowel.
*
* <p>Note that this will return {@code true} for things like {@code (array of number)}.
*/
private static boolean startsWithVowel(String word) {
for (int i = 0; i < word.length(); i++)
if (isVowel(word.charAt(i))) return true;
else if (Character.isAlphabetic(word.charAt(i))) return false;
return false;
}