#include <bits/stdc++.h>
using namespace std;
char s[1010], a[1010], p[1020];
int a1, a2, tot;
void cal() {
  if (a[tot - 2] == '.') {
    a2 += ((a[tot - 1] - '0') * 10 + (a[tot] - '0'));
    tot -= 3;
  }
  if (a2 >= 100) a2 -= 100, a1++;
  int sum = 0;
  for (int i = 1; i <= tot; i++)
    if (a[i] != '.') sum = sum * 10 + a[i] - '0';
  a1 += sum;
}
int main() {
  scanf("%s", s + 1);
  int len = strlen(s + 1);
  for (int i = 1; i <= len; i++) {
    if ((s[i] < '0' || s[i] > '9') && s[i] != '.') continue;
    if ((s[i - 1] < '0' || s[i - 1] > '9') && s[i - 1] != '.') {
      cal();
      memset(a, 0, sizeof(a));
      tot = 0;
    }
    a[++tot] = s[i];
    if (i == len) cal();
  }
  int np = 0;
  if (a1 == 0)
    np = 1, p[1] = '0';
  else {
    int tmp = 0;
    while (a1 > 0) {
      p[++np] = a1 % 10 + '0';
      tmp++;
      if (tmp == 3) {
        p[++np] = '.';
        tmp = 0;
      }
      a1 /= 10;
    }
  }
  if (p[np] != '.') printf("%c", p[np]);
  for (int i = np - 1; i >= 1; i--) printf("%c", p[i]);
  if (a2) printf(".%02d", a2);
  return 0;
}
