using System;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        var arr1 = Console.ReadLine().Split('.').Select(x => int.Parse(x)).ToArray();
        var arr2 = Console.ReadLine().Split('.').Select(x => int.Parse(x)).ToArray();

        for (int i=0; i<arr1.Length; i++)
        {
            if (arr1[i] < arr2[i]) { Console.WriteLine("NO"); return; } 
        }
        Console.WriteLine("YES");
    }
}