#include <bits/stdc++.h>   using namespace std;   int main() {     string s;     cin >> s;     int len = s.size();     int cnt = 0;     for (int i = 0; i < len; i++) {       if (s[i] ==  a  || s[i] ==  e  || s[i] ==  i  || s[i] ==  o  || s[i] ==  u )         cnt++;       if (s[i] ==  1  || s[i] ==  3  || s[i] ==  5  || s[i] ==  7  || s[i] ==  9 )         cnt++;     }     cout << cnt << endl;   }   