function countWordsStartingWithVowel(sentence: string): number {
  let count : number = 0;

  const words = sentence.split(' ')

  for( let i : number = 0; i < words.length; i++ ) {
    if ( /^[aeiouáéíóúAEIOUÁÉÍÓÚ]/.test(words[i]) ) count ++
  }
  return count;
}

// No modificar: necesario para evaluar el resultado.
export { countWordsStartingWithVowel };