using System;
using System.Linq;

class Program
{
    static void Main()
    {
        int[] a = Console.ReadLine().Split('.').Select(int.Parse).ToArray();
        int[] b = Console.ReadLine().Split('.').Select(int.Parse).ToArray();

        string ans = "YES";

        if (a[0] < b[0]) ans = "NO";
        else if (a[0]== b[0])
        {
            if(a[1]<b[1])ans = "NO";
            else if (a[1] == b[1])
            {
                if (a[2] < b[2]) ans = "NO";
            }
        }

        Console.WriteLine(ans);
    }
}