text: /* 
  Vowels function
  
  The vowels are a, e, i, u, o .
  Create function than take 
  string and return
  the number of vowels
  
  */
  
  function vowels(str) {
    let counter = 0;
    const vowels = "aeiuo";
  
    for (let char of str.toLowerCase()) {
      if (vowels.includes(char)) {
        counter++;
      }
    }
    return counter;
  }
  
  module.exports = vowels;
  