import java.util.*;
class test{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String A = sc.next();
		char[] a = A.toCharArray();
		String B = sc.next();
		char[] b = B.toCharArray();
		String str  = "YES";
		
		for(int i=0; i<a.length; i++){
			for(int j=0; j<b.length; j++){
				if(a[i] != '0' && a[i] == b[j]){
					a[i] = '0';
					b[j] = '0';
				}
			}
		}
		
		for(int i=0; i<a.length; i++){
			if(a[i] != '0'){
				str = "NO";
				break;
			}
		}
		System.out.println(str);
	}
}