#include <bits/stdc++.h>
using namespace std;
int main() {
  char str[100];
  cin >> str;
  int num, i;
  num = 0;
  for (i = 0; i < strlen(str); i++) {
    if (str[i] == 'a' || str[i] == 'e' || str[i] == 'i' || str[i] == 'o' ||
        str[i] == 'u') {
      num++;
    } else if (str[i] == '1' || str[i] == '3' || str[i] == '5' ||
               str[i] == '7' || str[i] == '9') {
      num++;
    }
  }
  cout << num << endl;
  return 0;
}
