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package com.codegym.task.task05.task0529;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Scanner;
/*
Console-based piggy bank
*/
public class Solution {
public static void main(String[] args) throws Exception {
Scanner input = new Scanner(System.in);
int sum = 0;
while (true) {
String exit = input.nextLine();
// exit = exit.toLowerCase();
if (exit.equals("sum")) {
break;
}
else {
int num = input.nextInt();
sum += num;
}
}
System.out.println(sum);
}
}