#include<bits/stdc++.h>
using namespace std;
int main(){
    string s;
    cin >> s;
    int total = 0;
    string current_num = "";

    for (char c : s) {
        if (isdigit(c)) {
            current_num += c;
        } else {
            if (!current_num.empty()) {
                total += stoi(current_num);
                current_num = "";
            }
        }
    }
    if (!current_num.empty()) {
        total += stoi(current_num);
    }

    cout << total << endl;
    return 0;
}