import java.util.Scanner;

import static java.lang.System.in;

public class SumNumbers {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(in);
        int sum = 0;
        String input = scanner.nextLine();
        while (!input.equals("Stop")) {
            int number = Integer.parseInt(scanner.nextLine());
            sum += number;
            input = scanner.nextLine();
        }
        System.out.println(sum);
    }
}