#include <bits/stdc++.h>
using namespace std;
int main() {
  int ans = 0;
  string s;
  cin >> s;
  set<char> st = {'a', 'e', 'i', 'o', 'u', '1', '3', '5', '7', '9'};
  for (auto c : s) ans += st.count(c);
  cout << ans;
  return 0;
}
