using System;

namespace yukicoder00138CS
{
	class Program
	{
		static void Main(string[] args)
		{
			var I = Console.ReadLine();
			var O = I.Split('.');
			var A = int.Parse(O[0]);
			var B = int.Parse(O[1]);
			var C = int.Parse(O[2]);
			var L = A * 10000 + B * 100 + C;

			I = Console.ReadLine();
			O = I.Split('.');
			A = int.Parse(O[0]);
			B = int.Parse(O[1]);
			C = int.Parse(O[2]);
			var T = A * 10000 + B * 100 + C;

			if (T <= L)
				Console.Write("YES");
			else
				Console.Write("NO");

		}
	}
}