#include <bits/stdc++.h>
using namespace std;
int main() {
  map<char, int> x;
  string s;
  cin >> s;
  int ans = 0;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' ||
        s[i] == 'u') {
      ans++;
    }
    if (s[i] >= '0' && s[i] <= '9') {
      int p = s[i] - '0';
      if (p % 2) {
        ans++;
      }
    }
  }
  cout << ans << endl;
}
