#include <bits/stdc++.h>
using namespace std;
bool check(char a) {
  if (a == 'a' || a == 'e' || a == 'i' || a == 'o' || a == 'u') return true;
  if (a == '1' || a == '3' || a == '5' || a == '7' || a == '9') return true;
  return false;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  string s;
  cin >> s;
  int ans = 0;
  for (int i = 0; i < s.length(); i++)
    if (check(s[i])) ans++;
  cout << ans;
}
