package test1;
import java.util.Scanner;

public class test1_class {
    public static void main(String[] args) {
        // 標準入力から読み込む際に、Scannerオブジェクトを使う。
        Scanner sc = new Scanner(System.in);
        
    	String A = sc.next();
    	String B = sc.next();
        StringBuffer sb = new StringBuffer(B);
    	String A_work;
    	int count=0;

    	if(A.length() == B.length()) {
    		for(int i=0; i<A.length(); i++) {
    			A_work = A.substring(i, i+1);
    			for(int j=0; j<B.length(); j++) {
    				if(A_work.equals(sb.substring(j, j+1))) {
    					count++;
    					sb.replace(j, j+1, "@"); 
    					break;
    				}
    			}
    		}
    	}

    	if(count >= A.length()){
    		System.out.println("YES" + "\n");
    	}else {
    		System.out.println("NO" + "\n");
    	}
        sc.close();
    }
}