#include <bits/stdc++.h>
using namespace std;
int main(void) {
  int n, i, cnt = 0;
  char ch[55];
  cin >> ch;
  n = strlen(ch);
  for (i = 0; i < n; i++) {
    if (ch[i] == 'a' || ch[i] == 'e' || ch[i] == 'i' || ch[i] == 'o' ||
        ch[i] == 'u' || ch[i] == '1' || ch[i] == '3' || ch[i] == '5' ||
        ch[i] == '7' || ch[i] == '9') {
      cnt++;
    }
  }
  cout << cnt;
  return 0;
}
