#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, i, j, k, l, flip = 0;
  string s;
  cin >> s;
  for (i = 0; s[i]; i++) {
    if (s[i] >= 'a' && s[i] <= 'z') {
      if (s[i] != 'a' && s[i] != 'e' && s[i] != 'i' && s[i] != 'o' &&
          s[i] != 'u')
        ;
      else {
        flip++;
      }
    } else {
      int dig = s[i] - '0';
      if (dig % 2) flip++;
    }
  }
  cout << flip << endl;
  return 0;
}
