using System;
using System.Collections.Generic;
using System.Linq;
using static System.Console;

class Program
{
    static void Main()
    {
        var A = ReadLine();
        var B = ReadLine();
        Array.Sort(A.ToArray());
        Array.Sort(B.ToArray());
        WriteLine(string.Join("", A) == string.Join("", B) ? "YES" : "NO");
    }
}