class Program
{
    static void Main(string[] args)
    {
        string topWord = Console.ReadLine()!;
        string bottomWord = Console.ReadLine()!;
        bool bl = false;

        foreach (char top in topWord)
        {
            bl = false;
            int count = 0;
            foreach (char bottom in bottomWord)
            {
                count++;
                if (top == bottom)
                {
                    bl = true;
                    break;
                }
            }
            if (!bl)
            {
                Console.WriteLine("NO");
                break;
            }

            bottomWord = bottomWord.Remove(count - 1, 1);
        }

        if (bl)
        {
            Console.WriteLine("YES");
        }
    }
}