using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace yukicoderTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string str = Console.ReadLine();
            string str2 = Console.ReadLine();
            int n = int.Parse(str);
            int m = int.Parse(str2);
            n = n * 100;
            m = m * 10;
            if(n==m)
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }
        }
    }
}