package com.javarush.task.task05.task0529;

import java.io.BufferedReader;
import java.io.InputStreamReader;

/*
Консоль-копилка
*/

public class Solution {
    public static void main(String[] args) throws Exception {
        BufferedReader buffer = new BufferedReader(new InputStreamReader(System.in));
        int sum=0;
        //String a="сумма";
        while (true)
        {
            String s = buffer.readLine();
            if (s.equals("сумма"))
            break;
            int h = Integer.parseInt(s);
            sum += h;


        }
            System.out.println("сумма " + sum);
        }

    }