import java.util.Scanner;

public class salary{
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int browsersNum = Integer.parseInt(scanner.nextLine());

        int salary = Integer.parseInt(scanner.nextLine());
        int loss = 0;

        for (int i = 1; i <= browsersNum; i++) {
            String site = scanner.nextLine();


            if (site.equalsIgnoreCase("Facebook")) {
                loss += 150;
            } else if (site.equalsIgnoreCase("Instagram")) {
                loss += 100;
            } else if (site.equalsIgnoreCase("Reddit")) {
                loss += 50;
            }

        }

            if (loss > salary) {
                System.out.println("You have lost your salary.");
            } else {
                System.out.println(salary - loss);
            }

    }
}