#include <bits/stdc++.h>
using namespace std;
const int N = 55;
const int M = 1000000007;
int n, m;
char a[N];
int main() {
  scanf("%s", a);
  int ans = 0;
  for (int i = 0; a[i]; i++) {
    if (a[i] == 'a' || a[i] == 'e' || a[i] == 'i' || a[i] == 'o' ||
        a[i] == 'u' || (a[i] >= '0' && a[i] <= '9' && (a[i] - '0') % 2 == 1)) {
      ans++;
    }
  }
  printf("%d\n", ans);
}
