#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  int ans = 0;
  cin >> s;
  for (int i = 0; i < s.size(); i++) switch (s[i]) {
      case 'a':
      case 'e':
      case 'o':
      case 'i':
      case 'u':
      case '1':
      case '3':
      case '5':
      case '7':
      case '9':
        ans++;
    }
  cout << ans;
}
