#include <bits/stdc++.h>
using namespace std;
int main() {
  string a;
  cin >> a;
  int counter = 0;
  for (int i = 0; i < a.size(); i++) {
    char c = a[i];
    if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' || c == '1' ||
        c == '3' || c == '5' || c == '7' || c == '9') {
      counter++;
    }
  }
  printf("%d\n", counter);
  return 0;
}
