import java.util.Scanner;
public class Main {

    public static void main(String[] args) {

        Scanner keyboard = new Scanner(System.in);
        int choice = 0;

        while (choice != 4) {
            System.out.println();
            System.out.println("1. Add Keychains to Order");
            System.out.println("2. Remove Keychains from Order");
            System.out.println("3. View Current Order");
            System.out.println("4. Checkout");

            System.out.println("Please enter your choice:");
            choice = keyboard.nextInt();


            if (choice == 1) {
                add_keychains();
            } else if (choice == 2) {
                remove_keychains();
            } else if (choice == 3) {
                view_order();
            } else if (choice == 4) {
                checkout();
            }
        }

        }
        public static void add_keychains () {
            System.out.println("ADD KEYCHAINS");
        }
        public static void remove_keychains () {
            System.out.println("REMOVE KEYCHAINS");
        }
        public static void view_order () {
            System.out.println("VIEW ORDER");
        }
        public static void checkout () {
            System.out.println("CHECKOUT");
        }
}