#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <fstream>
#include <stdexcept>
using namespace std;
 
inline void keep_window_open() { /*char ch; cin >> ch;*/ }
 
int main() {
    int sum = 0, number;
    vector<int> numbers;
    string word;
    //ifstream file("file1.txt");
    istream &file = cin;
 
    while (file >> word) {
        try {
            number = stoi(word);
        }
        catch (const std::exception &) {
            continue;
        }
        numbers.push_back(number);
    }
 
    if (file.fail() && !file.eof())
    {
	    cout << "failed\n";
    	exit(1);
    }
 
    for (int x : numbers)
        sum += x;
 
    cout << sum << "\n";
    keep_window_open();
 
    return 0;
}

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words 32 jd: 5 alkj 3 12 fjkl 
23 / 32
hey 332 2 jk 23 k 23 ksdl 3
32 kjd 3 klj 332 c 32