#include <bits/stdc++.h>
using namespace std;
int h[300];
int main() {
  string s;
  cin >> s;
  int len = s.size();
  int i;
  for (i = 0; i < len; i++) {
    h[s[i]]++;
  }
  int ans = h['a'] + h['e'] + h['i'] + h['o'] + h['u'] + h['1'] + h['3'] +
            h['5'] + h['7'] + h['9'];
  cout << ans;
  return 0;
}
