#include<iostream>
#include<string>
#include<cstdio>
#include<algorithm>
#include<stack>
#include<queue>
#include<vector>
#include<cmath>
#include<utility>
#include<set>
#include<complex>
#define vi vector<int>
#define vvi vector<vector<int> >
#define ll long long int
#define vl vector<ll>
#define vvl vector<vector<ll>>
#define vb vector<bool>
#define vc vector<char>
#define vs vector<string>
#define ld long double
#define INF 1e9
#define EPS 0.0000000001
#define rep(i,n) for(int i=0;i<n;i++)
#define CC puts("-------ok--------");
#define all(in) in.begin(), in.end()
#define bv vector<bool>
using namespace std;
typedef pair<int, int> PI;
#define MAX 99999999
int main(){
    string s;
    int sum=0;
    while(cin>>s){
        bool check=true;
        vi v;
        rep(i,s.size()){
            if(48<=s[i]&&s[i]<=57){
                v.push_back(s[i]-48);
                check=true;
            }else check=false;
            if((!check&&!v.empty())||i==s.size()-1){
                rep(j,v.size()){
                    int temp=v[j]*(int)pow((double)10, v.size()-j-1);
                    sum+=temp;
                    if(j==v.size()-1) v.erase(all(v));
                }
            }
        }
    }
    cout<<sum<<endl;
}