#include <bits/stdc++.h>
using namespace std;
int main(void) {
  string s;
  cin >> s;
  int ans = 0;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] >= 'a' && s[i] <= 'z') {
      switch (s[i]) {
        case 'a':
        case 'e':
        case 'i':
        case 'o':
        case 'u':
          ans++;
      }
    } else {
      if ((s[i] - '0') % 2 == 1) {
        ans++;
      }
    }
  }
  printf("%d\n", ans);
  return 0;
}
