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

int main(){
  string str;
  int sum = 0,num;

  while(getline(cin,str)){
    for(int i = 0 ; i < str.size() ; i++){
      if('0' <= str[i] && str[i] <= '9') continue;
      else str[i] = ' ';
    }

    stringstream s;
    s << str;
    while(s >> num){
      sum += num;
    }
  }
  cout << sum << endl;

  return 0;
}