#include <bits/stdc++.h>
using namespace std;
int main() {
  string str;
  int vowels = 0, odd = 0;
  cin >> str;
  for (int i = 0; i < str.size(); i++) {
    if (str[i] == 'a' || str[i] == 'e' || str[i] == 'i' || str[i] == 'o' ||
        str[i] == 'u')
      vowels++;
    else if ((str[i] - '0' >= 0 && str[i] - '0' <= 9)) {
      if ((int)(str[i] - '0') % 2 != 0) odd++;
    }
  }
  cout << vowels + odd << endl;
  return 0;
}
