#include <bits/stdc++.h>
using namespace std;
int main() {
  char str[111];
  cin >> str;
  int cnt = 0;
  for (int i = 0; str[i]; i++) {
    if (str[i] == 'i' || str[i] == 'o' || str[i] == 'u' || str[i] == 'a' ||
        str[i] == 'e') {
      cnt++;
    }
    if (str[i] >= '0' && str[i] <= '9') {
      if ((str[i] - '0') & 1) cnt++;
    }
  }
  cout << cnt << endl;
  return 0;
}
