#include <bits/stdc++.h>
using namespace std;
int ans;
char s[100];
int main() {
  cin >> s;
  for (int i = 0; i < strlen(s); i++)
    if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' ||
        s[i] == 'u' || s[i] == '1' || s[i] == '3' || s[i] == '5' ||
        s[i] == '7' || s[i] == '9')
      ans++;
  cout << ans << endl;
  return 0;
}
