#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
#include <set>
#include <map>
#include <string>
#include <stack>
#include <queue>
#include <cmath>
#include <cstdio>
#include <istream>
#include <sstream>
#include <iomanip>
#include <iterator>
#include <climits>
using namespace std;

typedef ostringstream OSS;
typedef istringstream ISS;

typedef vector<int> VI;
typedef vector< VI > VVI;

typedef long long LL;

typedef pair<int, int> PII;
typedef vector<PII> VPII;

#define X first
#define Y second

//string HOGE(".!\"#&%&'()*+,-/:;<=>?@[\\]^_`{|}~"); // ok
//string HOGE(".!\"#&%&'()*+,-/:"); // ok
string HOGE(";<=>?@[\\]^_`{|}~"); // 

int main(void) {
	string s;

	int total = 0;

	while (cin >> s) {
		replace_if(s.begin(), s.end(), [](char c){ return isalpha(c) || c == '.' || HOGE.find(c) != string::npos; }, ' ');
		
		istringstream iss(s);
		int num;
		while (iss >> num) {
			total += num;
		}
	}

	cout << total << endl;

	return 0;
}