using System;
using System.Linq;

public class Program
{
    public static void Main()
    {
        int[] a= Console.ReadLine().Split('.').Select(i => int.Parse(i)).ToArray();
        int[] x= Console.ReadLine().Split('.').Select(i => int.Parse(i)).ToArray();
        string ans="";
        if (a[0]>x[0] || (a[0]==x[0] && a[1]>x[1])|| (a[0]==x[0]&& a[1]==x[1] && a[2] >= x[2]))
        {
            ans="YES";
        } else
        {
            ans="NO";
        }
        Console.WriteLine(ans);
    }
}