#include <bits/stdc++.h>
using namespace std;
signed main() {
  string s;
  cin >> s;
  long long n = s.size();
  long long cnt = 0;
  for (long long i = 0; i < n; i++) {
    char c = s[i];
    if (c == 'a' || c == 'e' || c == 'u' || c == 'i' || c == 'o' || c == '1' ||
        c == '3' || c == '5' || c == '7' || c == '9')
      cnt++;
  }
  cout << cnt << '\n';
}
