#include <bits/stdc++.h>
using namespace std;
int main() {
  string vowel = "AEIOUYaeiouy";
  string in;
  char s;
  bool x = false;
  getline(cin, in);
  int h = in.size();
  for (int k = (h - 1); k >= 0; k--) {
    if (isalpha(in[k])) {
      s = in[k];
      break;
    }
  }
  for (int i = 0; i < vowel.size(); i++) {
    if (s == vowel[i]) {
      x = true;
      break;
    }
  }
  if (x == true)
    cout << "YES";
  else
    cout << "NO";
}
