#include <bits/stdc++.h>
using namespace std;
string s;
char c;
int db;
int main() {
  ios_base::sync_with_stdio(false);
  cin >> s;
  for (int i = 0; i < s.length(); i++) {
    c = s[i];
    if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' || c == '1' ||
        c == '3' || c == '5' || c == '7' || c == '9')
      db++;
  }
  cout << db << endl;
  return 0;
}
