package com.javarush.task.task05.task0529;

import java.io.*;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/*
Консоль-копилка
*/

public class Solution {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        int sum = 0;
        int b=0;
        while(b!=1)
        {
            String c = reader.readLine();
            if(c!="сумма")
            {
              int a = Integer.parseInt(c);
              sum = sum + a;
            }   else
               {
                  b = 1;
               }
        }
        System.out.println(sum);
        //напишите тут ваш код
    }
}