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

class Program
{
	static void Main(string[] args)
	{
		No138.Proc();
	}
}

public class No138
{
	public static void Proc()
	{
		var OldVersion = Console.ReadLine().Split('.').Select(x => Convert.ToInt32(x)).ToList<int>();
		var Version = Console.ReadLine().Split('.').Select(x => Convert.ToInt32(x)).ToList<int>();

		if(System.Math.Pow(10,8) * OldVersion[0] + System.Math.Pow(10,4) * OldVersion[1]  + OldVersion[2]   >= System.Math.Pow(10,8) * Version[0] + System.Math.Pow(10,4) * Version[1]  + Version[2])
			Console.WriteLine("YES");
		else
			Console.WriteLine("NO");
	}
}