#include <bits/stdc++.h>
using namespace std;
int isNeed(char ch) {
  if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') {
    return 1;
  }
  if (isdigit(ch) == 1) {
    int x = ch - '0';
    return (x % 2);
  }
  return 0;
}
int main() {
  string s;
  cin >> s;
  int ans = 0, i, l = (int)s.size();
  for (i = 0; i < l; i++) {
    ans += isNeed(s[i]);
  }
  cout << ans << '\n';
  return 0;
}
