using System;

public class Program

{

    public static void Main()

    {

        string word1 = Console.ReadLine();

        string word2 = Console.ReadLine();

        word1 = word1.ToLower();

        word2 = word2.ToLower();

        if (word1==word2)

        {

            Console.WriteLine("yes");

        }

        else

        {

            Console.WriteLine("no");

        }

    }

}