#include <bits/stdc++.h>
int main() {
  char a[50];
  scanf("%s", a);
  int i, s = 0, l = 0;
  l = strlen(a);
  for (i = 0; i < l; i++) {
    if ((a[i] == 'a') || (a[i] == 'e') || (a[i] == 'i') || (a[i] == 'o') ||
        (a[i] == 'u') || (a[i] == '1') || (a[i] == '3') || (a[i] == '5') ||
        (a[i] == '7') || (a[i] == '9'))
      s++;
  }
  printf("%d\n", s);
  return 0;
}
