#include <bits/stdc++.h>
using std::cin;
using std::cout;
using std::deque;
using std::endl;
using std::map;
using std::max;
using std::min;
using std::multiset;
using std::pair;
using std::queue;
using std::set;
using std::sort;
using std::stack;
using std::string;
using std::vector;
int main() {
  string s;
  int answer = 0;
  cin >> s;
  for (int i = 0; i < s.size(); i++) {
    char x = s[i];
    if (x == 'a' || x == 'e' || x == 'i' || x == 'o' || x == 'u' ||
        (x >= '0' && x <= '9' && (x - '0') % 2))
      answer++;
  }
  cout << answer;
  return 0;
}
