#include <bits/stdc++.h>
using namespace std;
int main() {
  string str;
  cin >> str;
  int len = str.length(), ans = 0;
  for (int i = 0; i < len; i++) {
    if (str[i] == 'a' || str[i] == 'e' || str[i] == 'i' || str[i] == 'o' ||
        str[i] == 'u') {
      ans++;
    }
    int ascii = (int)str[i];
    if (ascii % 2 != 0 && ascii >= 48 && ascii <= 57) {
      ans++;
    }
  }
  cout << ans << endl;
  return 0;
}
