#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  cin >> s;
  long long i, ans = 0;
  for (i = 0; i < s.length(); i++) {
    if (s[i] >= 'a' && s[i] <= 'z' && s[i] != 'a' && s[i] != 'o' &&
        s[i] != 'i' && s[i] != 'e' && s[i] != 'u')
      continue;
    else if (s[i] >= '0' && s[i] <= '9') {
      if ((s[i] - '0') % 2 != 0) ans++;
    } else {
      ans++;
    }
  }
  cout << ans;
}
