#include <bits/stdc++.h>
using namespace std;
const long long MOD = (int)1e9 + 7;
int dx[] = {1, -1, 0, 0, 1, -1, 1, -1};
int dy[] = {0, 0, -1, 1, 1, -1, -1, 1};
const int MAX = (int)1e5 + 10;
using namespace std;
void Ka8eeM() {
  ios::sync_with_stdio(false);
  cin.tie(0), cout.tie(0);
}
int main() {
  Ka8eeM();
  string s;
  cin >> s;
  int ans = 0;
  for (int i = 0; i < (int)s.size(); i++) {
    if (isdigit(s[i])) {
      if ((s[i] - '0') % 2) ans++;
    }
    if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i] == 'u')
      ans++;
  }
  cout << ans << endl;
  return 0;
}
