using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace programPractice
{
    class Program
    {
        static void Main(string[] args)
        {

            var a = Console.ReadLine();
            var b = Console.ReadLine();


            char[] cArray1 = a.ToCharArray();
            char[] cArray2 = b.ToCharArray();

            Array.Sort(cArray1);
            Array.Sort(cArray2);

            bool isEqual = cArray1.SequenceEqual(cArray2);

            if (isEqual)
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }

        }
    }
}