package com.javarush.task.task05.task0529;

import java.util.Scanner;

public class Solution {
    public static void main(String[] args) throws Exception {
    Scanner sc = new Scanner(System.in);


        int sum = 0;
        while (true){
            int a = sc.nextInt();
        	String s = sc.nextLine();
	        if (s.equals("сумма"))
		    break;
		    else sum = sum + a;
        }

        System.out.println(sum);
    }
}