import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        List<String> A = new ArrayList<>(Arrays.asList(sc.next().split("")));
        List<String> B = new ArrayList<>(Arrays.asList(sc.next().split("")));

        A.removeAll(B);
        B.removeAll(A);

        System.out.println((A.size() == 0 && B.size() == 0)? "YES" : "NO");
    }
}