#include<iostream>
#include<string>
#include<deque>
using namespace std;
int main() {
    string s;
    int sum = 0;
    while (cin >> s){
        deque<int>l;
        for (int i = 0; i < s.size(); i++){
            char c = s[i];
            if (c == '0' || c == '1' || c == '2' || c == '3' || c == '4' || c == '5' || c == '6' || c == '7' || c == '8' || c == '9')
                l.push_front(c - '0');
            else if (!l.empty()){
                for (int i = 0; i < l.size(); i++){
                    int t = 1;
                    for (int j = 0; j < i; j++) {
                        t *= 10;
                    }
                    t *= l[i];
                    sum += t;
                }
                l.clear();
            }
        }
    }
    cout << sum << endl;
    return 0;
}