using System;

class Program
{
    static void Main()
    {
        string s0 = Console.ReadLine();
        string s1 = Console.ReadLine();
        Array.Sort(s0.ToCharArray());
        Array.Sort(s1.ToCharArray());
        if(s0 == s1)
        {
            Console.WriteLine($"YES");
        }
        else
        {
            Console.WriteLine($"YES");
        }
    }
}