#include <bits/stdc++.h>
using namespace std;
string s;
int main() {
  cin >> s;
  s = ' ' + s;
  int dem = 0;
  for (int i = 1; i <= s.size() - 1; i++) {
    if (s[i] < 97 && (s[i] - '0') % 2 != 0)
      dem++;
    else if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' ||
             s[i] == 'u')
      dem++;
  }
  cout << dem;
}
