#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7;
const int MX = 3e5 + 9;
string s;
int main() {
  cin >> s;
  int ans = 0;
  for (int i = 0; i < s.size(); i++) {
    if (isdigit(s[i])) {
      int x = s[i] - '0';
      ans += (x % 2);
    } else {
      if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' ||
          s[i] == 'u')
        ans++;
    }
  }
  cout << ans << endl;
}
