#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  getline(cin, s);
  long long n = s.length(), i = n - 1;
  while (1) {
    if ((s[i] >= 65 && s[i] <= 91) || (s[i] >= 97 && s[i] <= 122)) {
      if (s[i] == 'a' || s[i] == 'y' || s[i] == 'e' || s[i] == 'i' ||
          s[i] == 'o' || s[i] == 'u') {
        cout << "YES" << endl;
        break;
      } else if (s[i] == 'A' || s[i] == 'Y' || s[i] == 'E' || s[i] == 'I' ||
                 s[i] == 'O' || s[i] == 'U') {
        cout << "YES" << endl;
        break;
      } else {
        cout << "NO" << endl;
        break;
      }
    }
    i--;
  }
}
