#include <bits/stdc++.h>
using namespace std;
char s[60];
bool iseven(char x) {
  if (x == '0' || x == '2' || x == '4' || x == '6' || x == '8')
    return true;
  else
    return false;
}
bool isodd(char x) {
  if (x == '1' || x == '3' || x == '5' || x == '7' || x == '9')
    return true;
  else
    return false;
}
int main() {
  scanf("%s", s);
  int a, b, c, d;
  a = b = c = d = 0;
  for (int i = 0; s[i] != '\0'; i++) {
    if (iseven(s[i]))
      a++;
    else if (isodd(s[i]))
      b++;
    else if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' ||
             s[i] == 'u')
      c++;
    else
      d++;
  }
  cout << c + b;
  return 0;
}
