#include <bits/stdc++.h>
using namespace std;
string s;
int main() {
  getline(cin, s);
  int n, flag = 0;
  n = s.length();
  for (int i = n; i >= 0; i--) {
    if ((s[i] >= 'a' && s[i] <= 'z') || (s[i] >= 'A' && s[i] <= 'Z')) {
      if (s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' ||
          s[i] == 'u' || s[i] == 'y' || s[i] == 'A' || s[i] == 'E' ||
          s[i] == 'I' || s[i] == 'O' || s[i] == 'U' || s[i] == 'Y') {
        flag = 1;
      }
      break;
    }
  }
  if (flag) {
    cout << "YES\n";
  } else {
    cout << "NO\n";
  }
  return 0;
}
