#include <iostream>
#include <algorithm>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <numeric>
#include <bitset>
#include <cmath>

static const int MOD = 1000000007;
using ll = long long;
using u32 = unsigned;
using u64 = unsigned long long;
using namespace std;

template<class T> constexpr T INF = ::numeric_limits<T>::max()/32*15+208;

int main() {
    string s;
    int ans = 0, val = 0;
    while(getline(cin, s)){
        for (auto &&i : s) {
            if(isdigit(i)) val = val*10+(i-'0');
            else ans += val, val = 0;
        }
        ans += val; val = 0;
    }
    cout << ans+val << "\n";
    return 0;
}
