using System;

public class Program {
    public static void Main() {
        int[] fossil = Array.ConvertAll<string, int>(Console.ReadLine().Split('.'), value => int.Parse(value));
        int[] obj = Array.ConvertAll<string, int>(Console.ReadLine().Split('.'), value => int.Parse(value));
        if (fossil[0] < obj[0]) {
            Console.WriteLine("NO");
            return;
        } else if (fossil[0] > obj[0]) {
            Console.WriteLine("YES");
            return;
        } else {
            if (fossil[1] < obj[1]) {
                Console.WriteLine("NO");
                return;
            } else if (fossil[1] > obj[1]) {
                Console.WriteLine("YES");
                return;
            } else {
                Console.WriteLine(fossil[2] >= obj[2] ? "YES" : "NO");
            }
        }
    }
}