#include <bits/stdc++.h>
using namespace std;
string s;
set<char> vowels = {'a', 'e', 'i', 'o', 'u'};
int main() {
  cin >> s;
  int nr = 0;
  for (auto c : s)
    if (vowels.count(c) || (c >= '0' && c <= '9' && (c - '0') % 2 == 1)) nr++;
  cout << nr;
  return 0;
}
