class Program
    {
        static void Main(string[] args)
        {
            string[] set = Console.ReadLine().Split(' ');
            if (set[0] == set[1] || set[0] == "2" && set[1] == "4" || set[0] == "4" && set[1] == "2")
            {
                Console.WriteLine("Yes");
            }
            else
            {
                Console.WriteLine("No");
            }
        }
    }