import java.util.Scanner;
class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] list = new int [26];
		
		String str = sc.next();
		char[] array = str.toCharArray();
		for(char ch:array) {
			if(ch - 'a' < 26)list[ch - 'a']++;
		}
		
		str = sc.next();
		char[] array2 = str.toCharArray();
		for(char ch:array2) {
			if(ch - 'a' < 26)list[ch - 'a']--;
		}
		
		for(int i:list) {
			if(i != 0) {
				System.out.println("NO");
				return;
			}
		}
		System.out.println("YES");
	}
}