#include <iostream>
#include <cstring>
using namespace std;
char s[256];
long long suma=0, termen, i, lung;
int main()
{
cin.getline(s, 256);
lung=strlen(s);
for (i=0; i<lung; ++i)
{
if (isdigit(s[i]))
{
termen=termen*10+(s[i]-'0');
}
else
{
suma=suma+termen; termen=0;
}
}
cout << suma;
return 0;
}