#include <bits/stdc++.h>
using namespace std;
inline bool ok(char x) {
  if (x >= '0' && x <= '9')
    return (x - '0') & 1;
  else {
    return x == 'a' || x == 'e' || x == 'i' || x == 'o' || x == 'u';
  }
}
int main() {
  string x;
  ios::sync_with_stdio(false);
  cin >> x;
  int ans = 0;
  for (auto u : x) {
    if (ok(u)) {
      ans += 1;
    }
  }
  cout << ans << "\n";
  return 0;
}
