using System;

namespace Vending_Machine
{
    class Program
    {
        static void Main(string[] args)
        {
            string command = Console.ReadLine();

            string productName = string.Empty;
            double sum = 0.00;
            double price = 0.00;
            while (command != "Start")
            {
                double coin = double.Parse(command);
                if (coin == 0.1 || coin == 0.2 || coin == 0.5 || coin == 1 || coin == 2)
                {
                    sum += coin;
                    command = Console.ReadLine();
                }
                else
                {
                    Console.WriteLine($"Cannot accept {coin}");
                    command = Console.ReadLine();
                }

            }
            while (command != "End")
            {
                productName = Console.ReadLine();
                if (productName == "End")
                {
                    Console.WriteLine($"Change: {sum:F2}");
                    break;
                }
                if (productName == "Nuts" || productName == "Water" || productName == "Crisps" || productName == "Soda" || productName == "Coke")
                {
                    switch (productName)
                    {
                        case "Nuts":
                            price = 2.00;
                            if (sum >= price)
                            {
                                sum -= price;
                                Console.WriteLine($"Purchased {productName.ToLower()}");
                            }
                            else
                            {
                                Console.WriteLine($"Sorry, not enough money");
                            }
                            break;
                        case "Water":
                            price = 0.70;
                            if (sum >= price)
                            {
                                sum -= price;
                                Console.WriteLine($"Purchased {productName.ToLower()}");
                            }
                            else
                            {
                                Console.WriteLine($"Sorry, not enough money");
                            }
                            break;
                        case "Crisps":
                            price = 1.50;
                            if (sum >= price)
                            {
                                sum -= price;
                                Console.WriteLine($"Purchased {productName.ToLower()}");
                            }
                            else
                            {
                                Console.WriteLine($"Sorry, not enough money");
                            }
                            break;
                        case "Soda":
                            price = 0.80;
                            if (sum >= price)
                            {
                                sum -= price;
                                Console.WriteLine($"Purchased {productName.ToLower()}");
                            }
                            else
                            {
                                Console.WriteLine($"Sorry, not enough money");
                            }
                            break;
                        case "Coke":
                            price = 1.00;
                            if (sum >= price)
                            {
                                sum -= price;
                                Console.WriteLine($"Purchased {productName.ToLower()}");
                            }
                            else
                            {
                                Console.WriteLine($"Sorry, not enough money");
                            }
                            break;
                    }
                }
                else if (productName != "Nuts" || productName != "Water" || productName != "Crisps" || productName != "Soda" || productName != "Coke")
                {
                    Console.WriteLine($"Invalid product");
                }
            }
        }
    }
}