#include <bits/stdc++.h>
using namespace std;
const int maxn = 100;
char a[maxn];
int main() {
  int ans = 0;
  scanf("%s", a);
  int len = strlen(a);
  for (int i = 0; i < len; i++) {
    if (a[i] == 'a' || a[i] == 'e' || a[i] == 'i' || a[i] == 'o' || a[i] == 'u')
      ans++;
    if (a[i] == '1' || a[i] == '3' || a[i] == '5' || a[i] == '7' || a[i] == '9')
      ans++;
  }
  printf("%d\n", ans);
  return 0;
}
