#include<iostream>
#include<string>
using namespace std;

int main()
{
    string s;
    int ans = 0;

    while(cin>>s){
        for(int i=0; i<s.size(); i++){

            int z = 0;

            while(s[i] >= '0' && s[i] <= '9'){
                z *= 10;
                z += s[i] -'0';
                i++;
            }
            ans += z;
        }
    }
    cout<<ans<<endl;
    return 0;
}