using System;
using System.Linq;
class P
{
    static void Main(string[] _)
    {
        var a = Console.ReadLine().AsEnumerable().OrderBy(c => c).ToArray();
        var b = Console.ReadLine().AsEnumerable().OrderBy(c => c).ToArray();
        Console.WriteLine(Array.Equals(a, b) ? "YES" : "NO");
    }
}