#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;

#define rep(i, n) REP(i, 0, n)
#define ALL(v) v.begin(), v.end()
#define MSG(a) cout << #a << " " << a << endl;
#define REP(i, x, n) for (int i = x; i < n; i++)
#define OP(m) cout << m << endl
typedef long long ll;
typedef unsigned long long ull;

int main()
{
    string s;
    int sum = 0, n;
    while (cin >> s)
    {
        rep(i, s.size())
        {
            if (s[i] < '0' || s[i] > '9')
                s[i] = ' ';
        }
        stringstream ss(s);
        while (ss >> n)
            sum += n;
    }

    OP(sum);

    return 0;
}
