function countWordsStartingWithVowel(sentence: string): number {
  let counter : number = 0;
  const vowels : string = 'aeiou'
  sentence.toLowerCase().split(' ').forEach(word => {
    if (vowels.includes(word[0]))
      counter++
  })
  
  return counter
}

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