public class MyClass {
    public static void main(String args[]) {
        java.util.Scanner scanner = new java.util.Scanner(System.in);
        String input = null;
        double sum = 0.0;
        double insertedCoin = 0.0;

        double nutsPrice = 2.0;
        double waterPrice = 0.7;
        double crispsPrice = 1.5;
        double sodaPrice = 0.8;
        double cokePrice = 1.0;
        while(true) {
            input = scanner.nextLine();
            if (input.equals("Start")) {
                break;
            }
            insertedCoin = Double.valueOf(input);
            if (insertedCoin == 0.1 || insertedCoin == 0.2 || insertedCoin == 0.5 || insertedCoin == 1 || insertedCoin == 2) {
                sum += insertedCoin;
            } else {
                System.out.printf("Cannot accept %.2f\n", insertedCoin);
            }
        }
        while(true) {
            input = scanner.nextLine();
            if (input.equals("End")) {
                System.out.printf("Change : %.2f", sum);
                break;
            }
            switch (input) {
                case "Nuts" : if (sum >= nutsPrice) {sum -= nutsPrice; System.out.println("Purchased " + input);} else { System.out.println("Sorry, not enough money");}break;
                case "Water" : if (sum >= waterPrice) {sum -= waterPrice;System.out.println("Purchased " + input);} else { System.out.println("Sorry, not enough money");}break;
                case "Crisps" : if (sum >= crispsPrice) {sum -= crispsPrice;System.out.println("Purchased " + input);} else { System.out.println("Sorry, not enough money");}break;
                case "Coke" : if (sum >= cokePrice) {sum -= cokePrice;System.out.println("Purchased " + input);} else { System.out.println("Sorry, not enough money");}break;
                case "Soda" : if (sum >= sodaPrice) {sum -= sodaPrice;System.out.println("Purchased " + input);} else { System.out.println("Sorry, not enough money");}break;
                default : System.out.println("Invalid product");
            }
        }
    }
}