using System;

namespace ConsoleApp17
{
    class Program
    {
        static void Main(string[] args)
        {


            double sum = 0;

            while (true)
            {

                string money = Console.ReadLine();

                if (money == "Start")
                {
                    break;
                }
                else if (money != "0.1" && money != "0.2" && money != "0.5" && money != "1" && money != "2")
                {
                    Console.WriteLine($"Cannot accept {money}");

                }
                else
                {
                    sum += double.Parse(money);

                }

            }

            while (true)
            {

                string product = Console.ReadLine();

                if (product == "End")
                {
                    break;
                }

                else if (product != "Nuts" && product != "Water" && product != "Crisps" && product != "Soda" && product != "Coke")
                {
                    Console.WriteLine("Invalid product");
                }

                switch (product)
                {
                    case "Nuts":
                        if (sum < 2.0)
                        {
                            Console.WriteLine("Sorry, not enough money");
                            break;
                        }
                        else
                        {
                            sum -= 2.0;
                            Console.WriteLine($"Purchased nuts");
                            break;
                        }
                    case "Water":
                        if (sum < 0.7)
                        {
                            Console.WriteLine("Sorry, not enough money");
                            break;
                        }
                        else
                        {
                            sum -= 0.7;
                            Console.WriteLine($"Purchased water");
                            break;
                        }
                    case "Crisps":
                        if (sum < 1.5)
                        {
                            Console.WriteLine("Sorry, not enough money");
                            break;
                        }
                        else
                        {
                            sum -= 1.5;
                            Console.WriteLine($"Purchased crisps");
                            break;
                        }
                    case "Soda":
                        if (sum < 0.8)
                        {
                            Console.WriteLine("Sorry, not enough money");
                            break;
                        }
                        else
                        {
                            sum -= 0.8;
                            Console.WriteLine($"Purchased soda");
                            break;
                        }
                    case "Coke":
                        if (sum < 1.0)
                        {
                            Console.WriteLine("Sorry, not enough money");
                            break;
                        }
                        else
                        {
                            sum -= 1.0;
                            Console.WriteLine($"Purchased coke");
                            break;
                        }
                }


            }

            Console.WriteLine($"Change: {sum:f2}");



        }


    }
}