#include <bits/stdc++.h>
using namespace std;
int main() {
  char a[103], c;
  int length, i, m;
  gets(a);
  length = strlen(a);
  for (i = length - 2; i >= 0; --i) {
    if (a[i] != ' ') {
      c = a[i];
      break;
    }
  }
  if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' || c == 'y' ||
      c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U' || c == 'Y') {
    printf("YES\n");
  } else {
    printf("NO\n");
  }
  return 0;
}
