#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 l = s.size(), cnt = 0;
  for (int i = 0; i < l; i++) {
    if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' ||
        s[i] == 'u' || s[i] == '1' || s[i] == '3' || s[i] == '5' ||
        s[i] == '7' || s[i] == '9')
      cnt++;
  }
  cout << cnt;
  cout << "\n";
  ;
  return 0;
}
