#include <bits/stdc++.h>
using namespace std;
int main(int argc, char* argv[]) {
  string str;
  cin >> str;
  int ans = 0;
  int len = str.length();
  for (int i = 0; i < len; ++i) {
    if (str[i] == 'a' || str[i] == 'e' || str[i] == 'i' || str[i] == 'o' ||
        str[i] == 'u' || str[i] == '1' || str[i] == '3' || str[i] == '5' ||
        str[i] == '7' || str[i] == '9')
      ans++;
  }
  cout << ans << endl;
  return 0;
}
