text: let letters = 'xyz';
  // let letters = 'aeiou';
  // let letters = 'zaei';
  // let letters = 'aeiz';
  // let letters = 'xyza';
  // let letters = 'axyz';
  // let letters = '';
  
  let noVowels = '';
  for (let character of input) {
    if ('aeiouAEIOU'.includes(character)) {
      continue;
    }
    noVowels = noVowels + character;
  }
  
  console.log(input + ' -> ' + noVowels);
  