#include <bits/stdc++.h>
using namespace std;
long long n, s, d;
bool f(char x) {
  if (x == 'a' || x == 'e' || x == 'i' || x == 'o' || x == 'u') return true;
  if (x >= '0' && x <= '9') {
    int p = x - '0';
    if (p % 2 == 1) return true;
  }
  return false;
}
int main() {
  string s;
  cin >> s;
  int d = 0;
  for (int i = 0; i < s.length(); i++) {
    if (f(s[i])) d++;
  }
  cout << d;
  return 0;
}
