#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  ;
  string s;
  cin >> s;
  int c = 0;
  for (int i = 0; i < s.length(); i++) {
    if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i] == 'u')
      c++;
    else if ((s[i] < 'a' || s[i] > 'z') && (s[i] - '0') % 2 != 0) {
      c++;
    }
  }
  cout << c << endl;
  return 0;
}
