// https://www.freecodecamp.org/learn/coding-interview-prep/data-structures/create-and-add-to-sets-in-es6

function checkSet() {
  var set = new Set([1, 2, 3, 3, 2, 1, 2, 3, 1]);
  // Only change code below this line
  [1, 2, 3, "Taco", "Cat", "Awesome"].forEach((element) => set.add(element));
  // Only change code above this line
  console.log(Array.from(set));
  return set;
}

checkSet();