// http://lx.lanqiao.cn/problem.page?gpid=T223
Scanner in = new Scanner(System.in);
String a = in.nextLine().toLowerCase();
String b = in.nextLine().toLowerCase();
int[] alp = new int[26];
for (char ch : a.toCharArray())
alp[ch - 'a']++;
for (char ch : b.toCharArray())
alp[ch - 'a']--;
boolean ret = true;
for (int i : alp) {
if (i != 0) {
ret = false;
break;
}
}
System.out.println(ret ? "Y" : "N");