#include <bits/stdc++.h>
using namespace std;
vector<int> v;
map<int, int> mp;
int main() {
  int n, a, b, c(0), x, y, z, p, q, r, mx, mn;
  mx = INT_MAX;
  mn = INT_MIN;
  string s;
  cin >> s;
  for (int i = 0; s[i] != '\0'; i++) {
    if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' ||
        s[i] == 'u' || s[i] == '1' || s[i] == '3' || s[i] == '5' ||
        s[i] == '7' || s[i] == '9')
      c++;
  }
  cout << c << endl;
  return 0;
}
