#include <bits/stdc++.h>
using namespace std;
char s[1050];
int main() {
  scanf("%s", s);
  int ans = 0;
  for (int i = 0; i < strlen(s); i++) {
    if (s[i] >= '0' && s[i] <= '9') {
      if ((s[i] - '0') % 2 == 1) {
        ans++;
        continue;
      }
    }
    if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i] == 'u')
      ans++;
  }
  printf("%d", ans);
}
