function inventory(input) {
    let inventory = input.shift().split(", ");


    for (const commands of input) {
        let command = input.shift();
        if (command !== "Craft!") {
            let splitCommand = command.split(" - ");
            let action = splitCommand[0];
            let item = splitCommand[1];
            switch (action) {
                case "Collect":
                    if (!inventory.includes(item)) {
                        inventory.push(item);



                    }
                    break;
                case "Drop":
                    let itemIndex = inventory.indexOf(item);
                    if (itemIndex != -1) {
                        inventory.splice(itemIndex, 1)


                    }
                    break;
                case "Combine Items":
                    let [oldItem, newItem] = item.split(":");
                    let oldIndex = inventory.indexOf(oldItem);
                    if (oldIndex != -1) {
                        inventory.splice(oldIndex + 1, 0, newItem);
                    }


                    break;
                case "Renew":
                    itemIndex = inventory.indexOf(item);
                    if (itemIndex != -1) {
                        inventory.splice(itemIndex, 1);
                        inventory.push(item);
                    }


                    break;
            }


        }




    }
    console.log(inventory.join(","));



}