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