#include <bits/stdc++.h>
using namespace std;
int main() {
  int i, count = 0;
  char s[60];
  scanf("%s", s);
  for (i = 0; s[i] != '\0'; 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') {
      count++;
    }
  }
  printf("%d\n", count);
  return 0;
}
