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