class Main {
  public static void main(String[] args) {
    String keyWord = "word_of_unknown_length";
    int numVowels = numberOfVowels(keyWord);
    System.out.println("There are " + numVowels + " vowels in " + keyword);
  }

  //write the method numberOfVowels that computes and returns the number of vowels in a String
}