function countWordsStartingWithVowel(sentence: string): number {
  const vowels = "aeiou"
  const splitSentence = sentence.toLowerCase().split(" ")
  
  const filteredArray = splitSentence.filter((word) => vowels.includes(word[0]))
  return filteredArray.length;
}

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