#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  int cnt = 0;
  cin >> s;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == 'a' || s[i] == 'o' || s[i] == 'e' || s[i] == 'u' ||
        s[i] == 'i' || s[i] == '1' || s[i] == '3' || s[i] == '5' ||
        s[i] == '7' || s[i] == '9')
      cnt++;
  }
  cout << cnt << endl;
  return 0;
}
