using System;
public class Program
{
    public static void Main()
    {
        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        //string[] pass = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        string a = Console.ReadLine() ?? string.Empty;
        string b = Console.ReadLine() ?? string.Empty;

        if(a == b)
        {
            Console.WriteLine("YES");
        }
        else
        {
            for(int i = 0; i < a.Length; i++)
            {
                int index = b.IndexOf(a[i]);
                if (index == -1)
                {
                    Console.WriteLine("NO");
                    return;
                }
                else
                {
                    b= b.Remove(index,1);
                }

            }
            Console.WriteLine("YES");
        }
    }
}