import java.util.Scanner;

public class Yukicoder69 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String a = sc.next();
		String b = sc.next();

		for (int i = 0; i < a.length(); i++) {
			if (b.contains("" + a.charAt(i)))
				b = b.substring(0, b.indexOf(a.charAt(i))) + b.substring(b.indexOf(a.charAt(i)) + 1, b.length());
		}
		
		if (b.equals("")) {
			System.out.println("YES");
		} else {
			System.out.println("NO");
		}

	}

}