#include<iostream>
#include<string>
#include<sstream>
#include<utility>
using namespace std;
pair<int,string> f(string s){
stringstream ss(s);
int n;string res;
ss>>n>>res;
return make_pair(n,res);
}
int main(){
string s;
int ans = 0;
while(cin>>s){
while(true){
while((s[0]<'0'||'9'<s[0]) && s.size()!=0)s=s.substr(1);
if(s.size()==0)break;
pair<int,string> tmp;
tmp= f(s);
ans += tmp.first;
s = tmp.second;
}
}
cout<<ans<<endl;
}