function shopping(input) {
  let products = input.shift().split("!");
  for (let i of input) {
    let [command, product, product2] = i.split(" ");
    if (command === "Urgent" && products.includes(product) === false) {
      products.unshift(product);
    } else if (command === "Unnecessary" && products.includes(product)) {
      let findProduct = products.indexOf(product);
      products.splice(findProduct, 1);
    } else if (command === "Correct" && products.includes(product)) {
      let findProduct = products.indexOf(product);
      products.splice(findProduct, 1, product2);
    } else if (command === "Rearrange" && products.includes(product)) {
      let findProduct = products.indexOf(product);
      let spliced = products.spliced(findProduct, 1);
      products.push(spliced);
    } else if (command === "Go" && product === "Shopping!") {
      console.log(products.join(", "));
      break;
    }
  }
}