#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  cin >> s;
  string v = "aeiou", odd = "13579";
  int c = 0;
  for (int i = 0; i < s.size(); i++)
    if (v.find(s[i]) != string::npos || odd.find(s[i]) != string::npos) c++;
  cout << c << endl;
}
