#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  string s;
  cin >> s;
  int ans = 0;
  char vowel[] = {'a', 'e', 'i', 'o', 'u'};
  for (int i = 0; s[i]; i++)
    if (find(vowel, vowel + 5, s[i]) != vowel + 5 or
        (s[i] >= '0' and s[i] <= '9' and (s[i] - '0') % 2 == 1))
      ans++;
  cout << ans << endl;
}
