#include <bits/stdc++.h>
using namespace std;
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  string s;
  getline(cin, s);
  for (auto i = s.end() - 1; i >= s.begin(); i--) {
    if ((int(*i) >= 65 && (int(*i) <= 90)) ||
        (int(*i) >= 97 && (int(*i) <= 122))) {
      if (*i == 'A' || *i == 'E' || *i == 'I' || *i == 'O' || *i == 'U' ||
          *i == 'a' || *i == 'e' || *i == 'i' || *i == 'o' || *i == 'u' ||
          *i == 'y' || *i == 'Y')
        cout << "YES";
      else
        cout << "NO";
      return 0;
    }
  }
}
