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