using System;
using System.IO;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Numerics;
using System.Diagnostics;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using static System.Math;
using static System.Console;


namespace yukicoder
{
    class Program
    {
        static void Main()
        {
            var a = Console.ReadLine().ToList();
            var b = Console.ReadLine().ToList();
            a.Sort();
            b.Sort();

            if (string.Join("", a).Equals(string.Join("", b)))
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }

        }
    }
}