#include <bits/stdc++.h>
using namespace std;
const long long M = 1000000007;
int main() {
  string s;
  cin >> s;
  int t, r = 0;
  for (int i = 0; i < s.length(); i++) {
    t = (int)s[i];
    if (t >= 48 && t <= 57 && t % 2 == 1)
      r++;
    else if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' ||
             s[i] == 'u')
      r++;
  }
  cout << r;
}
