#include <bits/stdc++.h>
using namespace std;
int32_t main() {
  ios::sync_with_stdio(false);
  cin.tie(0), cout.tie(0);
  string s;
  cin >> s;
  long long ansj = 0;
  for (long long i = 0; i < s.size(); i++) {
    if (s[i] == 'a' || s[i] == 'e' || s[i] == 'o' || s[i] == 'u' ||
        s[i] == 'i' ||
        ((s[i] - '0') >= 0 && (s[i] - '0') <= 9 && (s[i] - '0') % 2))
      ansj++;
  }
  cout << ansj << '\n';
}
