using System;
using System.Linq;

namespace TestConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            var strA = Console.ReadLine().OrderBy(i => i).ToArray();
            var strB = Console.ReadLine().OrderBy(i => i).ToArray();

            for (int i = 0; i < strA.Length; i++)
            {
                if (strA[i] != strB[i])
                {
                    Console.WriteLine("NO");
                    return;
                }
            }
            Console.WriteLine("YES");
        }
    }
}