#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  int ans = 0;
  cin >> s;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] >= 'a' && s[i] <= 'z') {
      if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' ||
          s[i] == 'u') {
        ans++;
      }
    } else {
      int x = s[i] - '0';
      if (x % 2 != 0) {
        ans++;
      }
    }
  }
  cout << ans;
  return 0;
}
