#include <bits/stdc++.h>
using namespace std;
const long long int INF = 1e18;
const int inf = 1e9;
const int MOD = 1e9 + 7;
const int nax = 1000000 + 10;
int n, arr[nax];
int main() {
  ios::sync_with_stdio(0);
  set<char> set1;
  set1.insert('a');
  set1.insert('e');
  set1.insert('i');
  set1.insert('o');
  set1.insert('u');
  string s;
  cin >> s;
  int ans = 0;
  n = s.length();
  for (int i = 0; i < n; i++) {
    char ch = s[i];
    if (isdigit(ch)) {
      int dig = ch - '0';
      if (dig % 2 == 1) ans++;
      continue;
    }
    if (set1.find(ch) != set1.end()) ans++;
  }
  cout << ans << "\n";
  return 0;
}
