#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0), cin.tie(0);
  string s;
  cin >> s;
  s = "X" + s;
  int cnt1 = 0, cnt2 = 0, minn;
  int flag = 0;
  for (int i = 1; i <= s.size(); i++) {
    if (s[i] == '1' || s[i] == '3' || s[i] == '5' || s[i] == '7' ||
        s[i] == '9' || s[i] == 'a' || s[i] == 'o' || s[i] == 'e' ||
        s[i] == 'i' || s[i] == 'u')
      cnt1++;
  }
  cout << cnt1 << endl;
  return 0;
}
