#include <bits/stdc++.h>
char s[55];
int main() {
  scanf("%s", s);
  int l = strlen(s);
  int sum = 0;
  for (int i = 0; i < l; 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')
      sum++;
  }
  printf("%d\n", sum);
  return 0;
}
