#include <bits/stdc++.h>
using namespace std;
const int mod = 1e9 + 7;
string s;
int main() {
  cin >> s;
  int len = s.size();
  int ans = 0;
  for (int i = 0; i < len; i++) {
    if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i] == 'u')
      ans++;
    if (s[i] >= '0' && s[i] <= '9') {
      int x = s[i] - '0';
      if (x % 2) ans++;
    }
  }
  cout << ans << endl;
  return 0;
}
