#include <bits/stdc++.h>
using namespace std;
char s[51];
int main() {
  int n, i, counter;
  scanf("%s", s);
  counter = 0;
  for (i = 0; i < strlen(s); ++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')
      ++counter;
  printf("%d", counter);
  return 0;
}
