#include <bits/stdc++.h>
using namespace std;
string s;
void solve() {
  cin >> s;
  int ans = 0;
  for (char c : s)
    if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' ||
        (isdigit(c) && (c - '0') & 1)) {
      ++ans;
    }
  cout << ans;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  solve();
  return 0;
}
