package com.company;


import java.math.BigDecimal;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        BigDecimal money = new BigDecimal(0);
        String text = "";
        String cmd;
        BigDecimal nutPrice = new BigDecimal(2);
        BigDecimal waterPrice = new BigDecimal(0.7);
        BigDecimal crispsPrice = new BigDecimal(1.5);
        BigDecimal sodaPrice = new BigDecimal(0.8);
        BigDecimal cokePrice = new BigDecimal(1);
        while (!text.equals("start"))
        {
            cmd = sc.nextLine();
            text = cmd.toLowerCase();
            if (text.equals("0,1") || text.equals("0,2") || text.equals("0,5") || text.equals("1") || text.equals("2") || text.equals("0.1") || text.equals("0.2") || text.equals("0.5"))
            {
                money = money.add(BigDecimal.valueOf(Double.parseDouble(text)));
            }
            else if (!text.equals("start"))
            {
                System.out.printf("Cannot accept %.2f\n",Double.parseDouble(cmd));
            }
        }
        while (!text.equals("end"))
        {
            cmd = sc.nextLine();
            text = cmd.toLowerCase();
            if (!text.equals("end"))
            {
                switch (text)
                {
                    case ("nuts"):
                    {
                        if (money.compareTo(nutPrice)<0)
                        {
                            System.out.println("Sorry, not enough money");
                            break;
                        }
                        else
                        {
                            System.out.println("Purchased " + cmd);
                            money = money.subtract(nutPrice);
                            break;
                        }

                    }
                    case ("water"):
                    {
                        if (money.compareTo(waterPrice)<0)
                        {
                            System.out.println("Sorry, not enough money");
                            break;
                        }
                        else
                        {
                            System.out.println("Purchased "+cmd);
                            money = money.subtract(waterPrice);
                            break;
                        }

                    }
                    case ("crisps"):
                    {
                        if (money.compareTo(crispsPrice)<0)
                        {
                            System.out.println("Sorry, not enough money");
                            break;
                        }
                        else
                        {
                            System.out.println("Purchased "+cmd);
                            money = money.subtract(crispsPrice);
                            break;
                        }

                    }
                    case ("soda"):
                    {
                        if (money.compareTo(sodaPrice)<0)
                        {
                            System.out.println("Sorry, not enough money");
                            break;
                        }
                        else
                        {
                            System.out.println("Purchased "+cmd);
                            money = money.subtract(sodaPrice);
                            break;
                        }

                    }
                    case ("coke"):
                    {
                        if (money.compareTo(cokePrice)<0)
                        {
                            System.out.println("Sorry, not enough money");
                            break;
                        }
                        else
                        {
                            System.out.println("Purchased "+cmd);
                            money = money.subtract(cokePrice);
                            break;
                        }

                    }
                    default:
                        System.out.println("Invalid product");
                        break;
                }

            }
        }
        System.out.printf("Change: %.2f",money);


    }
}