using System;

public class Program

{

    public static void Main()

    {   

        int p1=int.Parse(Console.ReadLine());

        int p2=int.Parse(Console.ReadLine());;

        int c1=int.Parse(Console.ReadLine());

        int c2=int.Parse(Console.ReadLine());

     int pmin,pmax,cmin,cmax;

     if(p1<p2)

     {pmin=p1;

      pmax=p2;

     }

     else 

     { pmin=p2;

      pmax=p1;

     }

     if(c1<c2)

     {

         cmin=c1;

         cmax=c2;

     }

     else 

     {

         cmin=c2;

         cmax=c1;

     }

     if(pmin<cmin && pmax<cmax)

     {Console.WriteLine("YES");}

    else

    {Console.WriteLine("NO");}

}}